What do you do if you're a world-famous K-pop star who inspired an internet craze, but you've recently had to apologise over remarks made about killing American soldiers "slowly and painfully"?

Well, if you're Psy, you shake the hand of Barack Obama in front of thousands of people at a charity concert.

Obama met the red-sequin clad South Korean singer after Sunday's 'Christmas In Washington', but unlike Ban Ki-Moon didn't attempt Psy's famous 'Gangnam style' dance move.

obama psy

Barack Obama shakes hands with South Korean rapper Psy


It's little wonder after the singer apologised for a 2004 song, performed in a protest in the wake of the Iraq war, where he said of American soldiers "kill those f---ing Yankees who have been torturing Iraqi captives" and "kill them all slowly and painfully."

Psy apologised after the song came to light, saying: "I will forever be sorry for any pain I have caused by those words,.. While I'm grateful for the freedom to express one's self, I've learned there are limits to what language is appropriate and I'm deeply sorry for how these lyrics could be interpreted."

Loading Slideshow...
  • Barack Obama, Michelle Obama, Sasha Obama, Malia Obama

    The first family, from left, first lady Michelle Obama, Sasha Obama, President Barack Obama and Malia Obama, pose with children dressed like elves at the National Building Museum in Washington, Sunday, Dec. 9, 2012. The first family is attending the taping of the 2012 Christmas in Washington. (AP Photo/Manuel Balce Ceneta)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama shakes hands with South Korean musician PSY (C), next to host Conan O'Brien (L) and performer Scotty McCreery (R) during the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama (2nd R), first lady Michelle Obama (L), and daughters Malia (R) and Sasha (2nd L) greet Christmas elves as they attend the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • Barack Obama, Michelle Obama, Sasha Obama, Malia Obama

    President Barack Obama, center, with, first lady Michelle Obama, back left, and their children Sasha, back center, and Malia, right, greet children dressed like elves at the National Building Museum in Washington, Sunday, Dec. 9, 2012. The first family is attending the taping of the 2012 Christmas in Washington. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Michelle Obama, Sasha Obama, Malia Obama

    The first family, from left, first lady Michelle Obama, Sasha Obama, President Barack Obama and Malia Obama, pose with children dressed like elves at the National Building Museum in Washington, Sunday, Dec. 9, 2012. The first family is attending the taping of the 2012 Christmas in Washington. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Michelle Obama, Sasha Obama, Malia Obama

    The first family, from left, first lady Michelle Obama, Sasha Obama, President Barack Obama and Malia Obama, pose with children dressed like elves at the National Building Museum in Washington, Sunday, Dec. 9, 2012. The first family is attending the taping of the 2012 Christmas in Washington. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Michelle Obama, Sasha Obama

    President Barack Obama delivers his remarks during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012, surrounded by his family first lady Michelle Obama, left, and daughters Malia, obscured, and Sasha. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Michelle Obama, Sasha Obama, Malia Obama

    The first family, from left, first lady Michelle Obama, Sasha Obama, President Barack Obama and Malia Obama, pose with children dressed like elves at the National Building Museum in Washington, Sunday, Dec. 9, 2012. The first family is attending the taping of the 2012 Christmas in Washington. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Sasha Obama, Malia Obama, Conan OíBrien, Megan Hilty, PSY

    President Barack Obama, third from left, with his daughters Malia Obama, from left, and Sasha Obama, join host, from third right to right, Conan O'Brien, singer Megan Hilty, South Korean rapper PSY and other performers, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

  • Marian Robinson, Michelle Obama, Demi Lovato, Chris Mann

    First lady Michelle Obama, second from right, and her mother Marian Robinson join singers Demi Lovato, from left, Chris Mann and other performers, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Sasha Obama, Malia Obama, Diana Ross, PSY

    President Barack Obama, left, with his daughters Sasha Obama, right, and Malia Obama, obscured, delivers his remarks during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. Other are singer Diana Ross, center, and South Korean rapper PSY, right. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama

    President Barack Obama smiles as he delivers his remarks during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

  • Marian Robinson, Michelle Obama, Demi Lovato, Chris Mann

    First lady Michelle Obama, second from right, and her mother Marian Robinson join singers Demi Lovato, from left, Chris Mann and other performers, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Sasha Obama, Malia Obama, Conan OíBrien, Megan Hilty, PSY

    President Barack Obama, third from left, with his daughters Malia Obama, from left, and Sasha Obama, join host, from third right to right, Conan O'Brien, singer Megan Hilty, South Korean rapper PSY and other performers, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

  • Barack Obama, Sasha Obama, Malia Obama

    President Barack Obama, from right, with his daughters Sasha Obama and Malia Obama, join singer Diana Ross, left, and other performers, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama and daughters Malia (L) and Sasha (C) sing a Christmas carol during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks watched by (from left) First Lady Michelle Obama, daughters Malia and Sasha, and singer Chris Mann during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, with daughters Malia (3rd R) and Sasha (2nd R) sing a Christmas carol during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, with daughters Malia (3rd R) and Sasha (2nd R) and Diana Ross (L), host Conan O’Brien (2nd R) and Actress/singer Megan Hilty sing a Christmas carol during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, with daughters Malia (3rd R) and Sasha (2nd R) sing a Christmas carol with Diana Ross (L) during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks watched by (from left) First Lady Michelle Obama, mother-in-law Marian Robinson, daughters Sasha and Malia during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks watched by (from left) First Lady Michelle Obama, mother-in-law Marian Robinson, daughters Sasha and Malia during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama chats with children dressed as elves as First Lady Michelle Obama with daughters Malia (R) and Sasha (2nd L, partially hidden) look on before the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks watched by (from left) First Lady Michelle Obama, daughters Malia and Sasha, and singer Chris Mann during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks watched by (from left) First Lady Michelle Obama, mother-in-law Marian Robinson, daughters Sasha and Malia during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama speaks watched by daughters Malia and Sasha during the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, First Lady Michelle Obama with daughters Malia (R) and Sasha (2nd L) pose with children dressed as elves before the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama (2nd R), first lady Michelle Obama (L), and daughters Malia (R) and Sasha (2nd L) greet Christmas elves as they attend the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, First Lady Michelle Obama with daughters Malia (R) and Sasha (2nd L) pose with children dressed as elves before the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama hugs the Christmas elves as they attend the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, First Lady Michelle Obama with daughters Malia (R) and Sasha (2nd L) pose with children dressed as elves before the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, First Lady Michelle Obama with daughters Malia (R) and Sasha (2nd L) pose with children dressed as elves before the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • US-POLITICS-CHRISTMAS-OBAMA

    US President Barack Obama, First Lady Michelle Obama with daughters Malia (R) and Sasha (2nd L) pose with children dressed as elves before the taping of the 'Christmas in Washington' television special on December 9, 2012 at the Building Museum in Washington. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama (2nd R), first lady Michelle Obama (L), and daughters Malia (R) and Sasha (2nd L) greet Christmas elves as they attend the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) Performer Diana Ross watches as President Barack Obama speaks during the 'Christmas in Washington' concert, attended by President Barack Obama, at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama hugs performer Diana Ross at the end of the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) South Korean musician PSY walks backstage before performing in the 'Christmas in Washington' concert, attended by President Barack Obama, at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama (C) takes part in the 'Christmas in Washington' concert with first lady Michelle Obama (L) and daughters Malia and Sasha Obama (R) at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama (C) speaks during the 'Christmas in Washington' concert with first lady Michelle Obama and daughters Malia and Sasha Obama at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama hugs the Christmas elves as they attend the 'Christmas in Washington' concert at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)

  • President Obama Attends Christmas in Washington

    WASHINGTON, DC - DECEMBER 9: (AFP OUT) U.S. President Barack Obama (Center R) takes part in the 'Christmas in Washington' concert with daughters Malia (Center L) and Sasha Obama (C), as host Conan O'Brien (R) and Performer Diana Ross (L) look on at the National Building Museum on December 9, 2012 in Washington, D.C. The concert benefits the National Childrens Medical Center and is hosted by comedian Conan O'Brien. (Molly Riley-Pool/Getty Images)