LAS VEGAS, NV - MARCH 04: (EXCLUSIVE COVERAGE) Britney Spears performs at her "Britney: Piece Of Me" show at Planet Hollywood Casino Resort on March 4, 2015 in Las Vegas, Nevada. (Photo by Denise Truscello/BSLV/Getty Images for Brandcasting, Inc)
LAS VEGAS, NV - MARCH 04: (EXCLUSIVE COVERAGE) Britney Spears performs at her "Britney: Piece Of Me" show at Planet Hollywood Casino Resort on March 4, 2015 in Las Vegas, Nevada. (Photo by Denise Truscello/BSLV/Getty Images for Brandcasting, Inc)