Britney Spears, Katy Perry Publicado 9 septiembre, 2014 en 500 × 751 en Britney Spears, Katy Perry ← Anterior Siguiente → Britney Spears, left, and Katy Perry arrive to the world premiere of «The Smurfs 2» at the Regency Village Theatre on Sunday, July 28, 2013 in Los Angeles. (Photo by John Shearer/Invision/AP)