Miley Cyrus(01 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(02 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(03 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(04 of23)
Open Image ModalMiley Cyrus, left, performs with dancers during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(05 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(06 of23)
Open Image ModalMiley Cyrus, left, performs alongside a dancer dressed as Santa Claus during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(07 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(08 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(09 of23)
Open Image ModalMiley Cyrus performs during the KIIS-FM Jingle Ball concert at Staples Center, on Friday, Dec. 6, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
Miley Cyrus(10 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(11 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(12 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(13 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(14 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(15 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(16 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(17 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(18 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(19 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(20 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(21 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(22 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)
Miley Cyrus(23 of23)
Open Image ModalLOS ANGELES, CA - DECEMBER 06: Recording artist Miley Cyrus performs onstage during KIIS FM's Jingle Ball 2013 at Staples Center on December 6, 2013 in Los Angeles, CA. (Photo by Jason Merritt/Getty Images for Clear Channel) (credit:Getty Images)