Wiz Khalifa, left, and Amber Rose arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Matt Sayles/Invision/AP)
Wiz Khalifa, left, and Amber Rose arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Matt Sayles/Invision/AP)
Wiz Khalifa and Amber Rose arrive at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Kevork Djansezian
Wiz Khalifa and Amber Rose arrive at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Wiz Khalifa, left, and Amber Rose arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Wiz Khalifa, left, and Amber Rose arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Ke$ha arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Ke$ha arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Charli XCX arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014.   Photo: REUTERS/Kevork Djansezian
Charli XCX arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Ashton Irwin, from left, Calum Hood, Luke Hemmings and Michael Clifford of 5 Seconds of Summer arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Ashton Irwin, from left, Calum Hood, Luke Hemmings and Michael Clifford of 5 Seconds of Summer arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Jessie J arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Jessie J arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Chanel Iman arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Chanel Iman arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Solange Knowles arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Kevork Djansezian
Solange Knowles arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Jordin Sparks, left, and Jason Derulo arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Matt Sayles/Invision/AP)
Jordin Sparks, left, and Jason Derulo arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Matt Sayles/Invision/AP)
Sarah Hyland arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Sarah Hyland arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Adam Levine, left, and Behati Prinsloo arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Adam Levine, left, and Behati Prinsloo arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Gwen Stefani arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Gwen Stefani arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Musician Nick Jonas and Olivia Culpo arrive at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Kevork Djansezian
Musician Nick Jonas and Olivia Culpo arrive at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Kendall Jenner, from left, Kim Kardashian, and Kylie Jenner arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Matt Sayles/Invision/AP)
Kendall Jenner, from left, Kim Kardashian, and Kylie Jenner arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Matt Sayles/Invision/AP)
Common and Usher greet each other at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Mario
Common and Usher greet each other at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Mario
Gwen Stafani arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Mario Anzuoni
Gwen Stafani arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Mario Anzuoni
Jennifer Lopez arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Mario Anzuoni
Jennifer Lopez arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Mario Anzuoni
Jennifer Lopez arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo:  REUTERS/Mario Anzuoni
Jennifer Lopez arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Mario Anzuoni
Jennifer Lopez arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Mario Anzuoni
Jennifer Lopez arrives at the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Mario Anzuoni
Iggy Azalea arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014.  Photo: REUTERS/Kevork Djansezian
Iggy Azalea arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Casper Smart arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Casper Smart arrives at the 2014 MTV Music Video Awards in Inglewood, California August 24, 2014. Photo: REUTERS/Kevork Djansezian
Riff Raff, left, and Katy Perry arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
Riff Raff, left, and Katy Perry arrive at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)

Katy in Britney-inspired denim, Amber Rose in nearly-nothing, J-LO in a sexy metallic gown, and more...