Ariana Grande, from left, Jessie J and Nicki Minaj perform at the MTV Video Music Awards at The Forum on Sunday, August 24, 2014, in Inglewood, Calif. (Photo by Chris Pizzello/Invision/AP Photo)

(L-R) Recording artists Jessie J, Ariana Grande, and Nicki Minaj perform onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Recording artists Jessie J (L) and Ariana Grande perform onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Jessie J. (C) performs on stage with Nicki Minaj (L) and Ariana Grande at the MTV Video Music Awards (VMA), August 24, 2014 at The Forum in Inglewood, California. (Photo by Robyn Beck/AFP Photo)

(Front to back) Recording artists Nicki Minaj, Jessie J, and Ariana Grande perform onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Taylor Swift performs “Shake It Off” during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Mario Anzuoni/Reuters)

Taylor Swift performs “Shake It Off” during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Mario Anzuoni/Reuters)

Taylor Swift performs “Shake It Off” during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Lucy Nicholson/Reuters)

Recording artist Taylor Swift (C) performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Recording artist Taylor Swift performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Rapper Iggy Azalea (L) and singer Rita Ora perform onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Mark Davis/Getty Images)

Iggy Azalea performs “Black Widow” during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Lucy Nicholson/Reuters)

Rapper Iggy Azalea performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Mark Davis/Getty Images)

Beyonce performs a medley of songs during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Mario Anzuoni/Reuters)

Beyonce performs a medley of songs during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Lucy Nicholson/Reuters)

Singer Beyonce performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Mark Davis/Getty Images)

Beyonce performs a medley of songs during the 2014 MTV Video Music Awards in Inglewood, California August 24, 2014. (Photo by Mario Anzuoni/Reuters)

Honoree Beyonce performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Recording artist Jessie J performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Recording artist Jessie J performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Jessie J. performs on stage at the MTV Video Music Awards (VMA), August 24, 2014 at The Forum in Inglewood, California. (Photo by Robyn Beck/AFP Photo)

Recording artist Nicki Minaj (C) performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Nicki Minaj performs on stage at the MTV Video Music Awards (VMA), August 24, 2014 at The Forum in Inglewood, California. (Photo by Robyn Beck/AFP Photo)

Recording artist Nicki Minaj performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Recording artists Katy Perry (R) and Juicy J accept the Best Female Video award for “Dark Horse” onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

TV personality Kim Kardashian speaks onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Actress Nina Dobrev (L) and recording artist Trey Songz speak onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Singer Jennifer Lopez speaks onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Mark Davis/Getty Images)

Recording artists Jordin Sparks (2nd L), Taylor Swift (C), and Lorde (2nd R) attend the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)

Ariana Grande performs at the MTV Video Music Awards at The Forum on Sunday, August 24, 2014, in Inglewood, Calif. (Photo by Chris Pizzello/Invision/AP Photo)

Recording artist Ariana Grande performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Michael Buckner/Getty Images)