Katy Perry

Katy Perry AP.jpg

** FILE ** Katy Perry at the MTV Video Music Awards in the Brooklyn borough of New York, Aug. 25, 2013. (Photo by Evan Agostini/Invision/AP, File)

DINNER_12371

Singer Katy Perry attends the White House Correspondents' Association Dinner at the Washington Hilton Hotel on Saturday, April 27, 2013, in Washington. (Evan Agostini/Invision/AP)

DINNER_12358

Singer Katy Perry attends the White House Correspondents' Association Dinner at the Washington Hilton Hotel on Saturday, April 27, 2013, in Washington. (Evan Agostini/Invision/AP)

Billboard Women in Mu_Lea.jpg

**FILE** Singer Katy Perry attends Billboard's Women in Music 2012 luncheon at Capitale in New York on Nov. 30, 2012. (Associated Press/Invision)

UNICEF Snowflake Ball_Lea.jpg

Singer-songwriter Katy Perry attends the eighth annual UNICEF Snowflake Ball at Cipriani 42nd Street on Tuesday, Nov. 27, 2012, in New York. (Evan Agostini/Invision/AP)

Pop singer Katy Perry performs before President Obama arrives at a campaign event on Saturday, Nov. 3, 2012, in Milwaukee. "Forward," Mr. Obama's campaign slogan, is emblazoned on her dress. (AP Photo/Morry Gash)

Obama 2012__Live_.jpg

Singer Katy Perry performs Oct. 24, 2012, for a crowd before the arrival of President Obama at a campaign rally in Las Vegas. (Associated Press)

Obama 2012___Live.jpg

Singer Katy Perry performs Oct. 24, 2012, for a crowd before the arrival of President Obama at a campaign rally in Las Vegas. (Associated Press)

MTVVMA_090632

Katy Perry, left, presents the best pop video award to Niall Horan and Harry Styles, right, of musical group One Direction, for "What Makes You Beautiful" at the MTV Video Music Awards on Thursday, Sept. 6, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)