Justin Bieber stunned the American Music Awards and his mother in Los Angeles on Sunday night when he was named Artist of the Year.

The Baby hitmaker had already claimed the night's first trophy for Favourite Pop/Rock Male Artist and the Favorite Pop/Rock Album prize when his name was called as will.i.am presented the ceremony's last category.

Dragging his reluctant mum Pattie Mallette up onstage with him, the pop superstar said, "This is my mom, she's little but she's beautiful... I wanna thank you for just always believing in me... This is amazing."

justin bieber

Justin Bieber danced in some red harem pants

He also addressed the drama swirling around his personal life amid reports he and longtime girlfriend Selena Gomez have split up, telling fans, "As long as you guys keep believing in me... I wanna always make you proud."

It was a great night for Bieber's musical family too - his mentor Usher and protege Carly Rae Jepsen both performed and took home awards.

justin bieber

Justin Bieber and his mum Pattie Mallette

Usher was named Favourite Soul/R&B Male Artist and Jepsen beat One Direction to score the New Artist prize.

Other performance highlights came from The Wanted, Kelly Clarkson, Ke$ha, No Doubt, Christina Aguilera, Taylor Swift and Pink, who recreated her dramatic performance dance video for Try onstage at the Nokia Theatre, while Psy closed the show with his international smash hit Gangnam Style - and a special guest.

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  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Gwen Stefani of No Doubt attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Justin Bieber, Jenny McCarthy

    Justin Bieber is smothered in kisses by presenter Jenny McCarthy as he accepts the award for favorite album - pop/rock for “Believe” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber, Nicki Minaj

    Justin Bieber, right, and Nicki Minaj perform at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber, Nicki Minaj

    Justin Bieber, right, and Nicki Minaj perform at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber

    Justin Bieber performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)

  • Justin Bieber, Jenny McCarthy

    Justin Bieber is smothered in kisses by presenter Jenny McCarthy as he accepts the award for favorite album - pop/rock for “Believe” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)

  • Justin Bieber, Jenny McCarthy

    Justin Bieber is smothered in kisses by presenter Jenny McCarthy as he accepts the award for favorite album - pop/rock for “Believe” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber, Jenny McCarthy

    Justin Bieber is smothered in kisses by presenter Jenny McCarthy as he accepts the award for favorite album - pop/rock for “Believe” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)

  • Justin Bieber

    Justin Bieber accepts the award for favorite album - pop/rock for “Believe” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)

  • Justin Bieber, Pattie Malette

    Justin Bieber brings his mom Pattie Malette on stage as he accepts the award for artist of the year at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)

  • Justin Bieber, will.i.am

    Justin Bieber accepts the award for artist of the year from presenter will.i.am at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • Justin Bieber, Pattie Malette

    Justin Bieber accepts the award for artist of the year as his mom Pattie Malette looks on at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber accepts the Favorite Pop/Rock Male Artist award onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber (R) and mother Pattie Malette attend the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber (R) and mother Pattie Malette attend the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber accepts the Favorite Pop/Rock Male Artist award onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber accepts the award for Favorite Pop/Rock Male Artist onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber (R) and mother Pattie Malette attend the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber (shoe detail) attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber (R) and mother Pattie Malette attend the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber (R) and mother Pattie Malette attend the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • Justin Bieber, Pattie Mallette

    Justin Bieber, right, kisses his mother Pattie Mallette as they arrive at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

  • Justin Bieber

    Justin Bieber arrives at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Justin Bieber attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Arrivals

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

  • The 40th American Music Awards - Show

    LOS ANGELES, CA - NOVEMBER 18: (L-R) Singer Christina Aguilera and rapper Pitbull perform onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

The South Korean pop sensation was joined onstage by MC Hammer for a mash-up of his catchy anthem and Too Legit to Quit.

Psy and dance music star David Guetta made history at the AMAs by winning the first ever New Media Award and Favorite Electronic Dance Music Artist honours, respectively.

There was also a tribute to the late Dick Clark, who created the American Music Awards. The music and TV mogul's longtime pal Stevie Wonder took to the stage to perform a three-song medley of hits as images of Clark were beamed onto a screen behind him.

The 2012 AMA winners are:

Favourite Pop/Rock Male Artist - Justin Bieber
Favourite Female Country Artist - Taylor Swift
New Media Award - Psy
Favourite Rap/Hip-Hop Album - Pink Friday: Roman Reloaded by Nicki Minaj
Favourite Alternative Rock Artist - Linkin Park
Favourite Soul/R&B Male Artist - Usher
Favourite Country Male Artist - Luke Bryan
New Artist of the Year - Carly Rae Jepsen
Favourite Country Band/Duo or Group - Lady Antebellum
Favourite Electronic Dance Music Artist - David Guetta
Favourite Pop/Rock Album - Believe by Justin Bieber
Favourite Rap/Hip-Hop Artist - Nicki Minaj
Favourite Country Album - Blown Away by Carrie Underwood
Artist of the Year - Justin Bieber.