Katy Perry arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Taylor Swift arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

LOS ANGELES, CA - SEPTEMBER 06: Rapper/singer Nicki Minaj arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

LOS ANGELES, CA - SEPTEMBER 06: Singer Ke$ha arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

LOS ANGELES, CA - SEPTEMBER 06: Actors Ezra Miller (L) and Emma Watson arrive at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

Alicia Keys arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

Wiz Khalifa and Amber Rose arrive at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Members of the British band One Direction, from left, Louis Tomlinson, Zayn Malik, Niall Horan, Harry Styles and Liam Payne arrive at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Ne-Yo arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

Pink, left, and Carey Hart arrive at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

RuPaul arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

LOS ANGELES, CA - SEPTEMBER 06: Singer Rihanna arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

Rihanna arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

Rita Ora arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

Actress Zoe Saldana arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

LOS ANGELES, CA - SEPTEMBER 06: (L-R) Rapper Mac Miller and actor Tyler Posey arrive at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

Amy Paffrath arrives at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)

LOS ANGELES, CA - SEPTEMBER 06: (L-R) Musician Regina Spektor, Dana York, musician Tom Petty and Adria Petty arrive at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

LOS ANGELES, CA - SEPTEMBER 06: Musician Regina Spektor arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

LOS ANGELES, CA - SEPTEMBER 06: Actress Holland Roden arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

LOS ANGELES, CA - SEPTEMBER 06: (L-R) Musicians Tre Cool, Billie Joe Armstrong and Mike Dirnt of Green Day arrive at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

LOS ANGELES, CA - SEPTEMBER 06: Singer Miley Cyrus arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

U.S. gymnasts, from left, McKayla Maroney, Jordyn Wieber, Kyla Ross, Gabrielle Douglas and Alexandra Raisman arrive at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)