Recording artists Iggy Azalea and Ariana Grande perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singers Rihanna and Ariana Grande attend the iHeartRadio Music Awards held at the Shrine Auditorium on May 1,...
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
IHEARTRADIO MUSIC AWARDS -- Pictured: Singers Rihanna and Ariana Grande attend the iHeartRadio Music Awards held at the Shrine Auditorium on May 1,...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande performs onstage during the iHeartRadio Music Awards held at the Shrine Auditorium on May...
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Recording artist Ariana Grande performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas,...
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Recording artist Ariana Grande performs with dancers during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande performs onstage during the iHeartRadio Music Awards held at the Shrine Auditorium on May...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande performs onstage during the iHeartRadio Music Awards held at the Shrine Auditorium on May...
Singers Iggy Azalea and Ariana Grande perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las...
Recording artists Iggy Azalea and Ariana Grande perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014...
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Recording artist Ariana Grande performs during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Recording artist Ariana Grande performs with dancers during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las...
Recording artist Ariana Grande performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas,...
Singer Ariana Grande performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada.
Rapper Iggy Azalea and singer Ariana Grande perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande accepts the iHeartRadio Young Influencer Award from actress Hilary Duff onstage during the...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande accepts the iHeartRadio Young Influencer Award onstage during the iHeartRadio Music Awards...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande accepts the iHeartRadio Young Influencer Award onstage during the iHeartRadio Music Awards...
IHEARTRADIO MUSIC AWARDS -- Pictured: Singer Ariana Grande performs onstage during the iHeartRadio Music Awards held at the Shrine Auditorium on May...
Ariana Grande performs onstage at iHeartRadio Ultimate Pool Party Presented By VISIT FLORIDA At Fontainebleau's BleauLive at Fontainebleau Miami...
Recording artists Ariana Grande and The Weeknd perform onstage at the 2014 American Music Awards at Nokia Theatre L.A. Live on November 23, 2014 in...
Hozier, Taylor Swift, Ed Sheeran and Ariana Grande with Victoria's Secret models on the runway during the 2014 Victoria's Secret Fashion Show at...
Scooter Braun and Ariana Grande attend the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California.
In this handout photo provided by Disney Parks, Ariana Grande performs "Last Christmas" and "Santa Tell Me" during the taping of the Disney Parks...
In this handout photo provided by Disney Parks, Ariana Grande poses with Mickey Mouse during the taping of the Disney Parks "Frozen Christmas...
Recording artists Rihanna and Ariana Grande backstage at the 2014 iHeartRadio Music Awards held at The Shrine Auditorium on May 1, 2014 in Los...
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,...
Recording artists The Weeknd and Ariana Grande perform onstage at the 2014 American Music Awards at Nokia Theatre L.A. Live on November 23, 2014 in...
In this handout photo provided by Disney Parks, Ariana Grande performs "Last Christmas" and "Santa Tell Me" during the taping of the Disney Parks...
Jake Miller and Ariana Grande attend Y100s Jingle Ball 2014 at BB&T Center on December 21, 2014 in Miami, FL.
Ariana Grande accepts award from Alicia Keys at the MTV EMA's 2014 at The Hydro on November 9, 2014 in Glasgow, Scotland.
In this handout photo provided by Disney Parks, singer Ariana Grande gives Mickey Mouse a kiss in front of Cinderella Castle in the Magic Kingdom...
Actresses Victoria Justice and Ariana Grande attend Nickelodeon's 27th Annual Kids' Choice Awards held at USC Galen Center on March 29, 2014 in Los...
Frankie J. Grande as "Franz" and sister Ariana Grande pose backstage at the hit musical "Rock Of Ages" on Broadway at The Helen Hayes Theater on...
In this handout photo provided by Disney Parks, singer Ariana Grande poses with Cinderella and Prince Charming in front of Cinderella Castle in the...
Taylor Swift, Ariana Grande and Ed Sheeran pose with the models on the runway at the annual Victoria's Secret fashion show at Earls Court on December...
Recording artists Nicki Minaj, Jessie J and Ariana Grande perform onstage at the 2014 American Music Awards at Nokia Theatre L.A. Live on November...
Recording artist Ariana Grande performs onstage during KIIS FM's Jingle Ball 2014 powered by LINE at Staples Center on December 5, 2014 in Los...
Singer Ariana Grande performs while model Elsa Hosk walks the runway at the annual Victoria's Secret fashion show at Earls Court on December 2, 2014...
Singer Ariana Grande performs onstage during A VERY GRAMMY CHRISTMAS at The Shrine Auditorium on November 18, 2014 in Los Angeles, California.
Ariana Grande arrives to the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California.
In this handout photo provided by Disney Parks, singer Ariana Grande poses with Cinderella and Prince Charming in front of Cinderella Castle in the...
Singer Ariana Grande attends the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, California.
Recording artist Ariana Grande performs onstage at the 2014 American Music Awards at Nokia Theatre L.A. Live on November 23, 2014 in Los Angeles,...
Actress/singer Ariana Grande and her grandmother arrive at the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California.
Singer Ariana Grande performs on The Honda Stage at the iHeartRadio Theater on August 18, 2014 in Burbank, California.
Singer Ariana Grande performs at 102.7 KIIS FM's Wango Tango at StubHub Center on May 10, 2014 in Los Angeles, California.
Singer Ariana Grande performs at 102.7 KIIS FM's Wango Tango at StubHub Center on May 10, 2014 in Los Angeles, California.
Clear Channel National Programming Platforms President Tom Poleman, singer Ariana Grande and Clear Channel Media Holdings Entertainment Enterprises...
Clear Channel National Programming Platforms President Tom Poleman, singer Ariana Grande and Clear Channel Media Holdings Entertainment Enterprises...
Actress Ariana Grande onstage during Nickelodeon's 27th Annual Kids' Choice Awards held at USC Galen Center on March 29, 2014 in Los Angeles,...
Recording artist Ariana Grande attends the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, California.
Fans using smart phones record the performance byTori Kelly and surprise guest singer Ariana Grande during MTV's 2014 "Artist To Watch" kickoff event...
Ariana Grande performs during Y100's Jingle Ball 2014 at BB&T Center on December 21, 2014 in Sunrise, Florida.