Katy Perry

Rita, Justin Bieber, Rihanna and Ariana Grande before they were famous

Katy Perry named the top-earning female musician

Katy Perry has made a Christmas song with Duke Dumont

WATCH: Katy Perry invites drunk fan on stage

WATCH: Katy Perry almost gets run over by a segway at Burning Man Festival

Taylor Swift has apologised to Nicki Minaj on Twitter

Katy Perry weighs in to Taylor Swift vs. Nicki Minaj Twitter feud

Katy Perry beats Kim Kardashian and Taylor Swift in celeb rich list

Madonna releases star-studded 'B*tch I'm Madonna' video - WATCH

Katy Perry denies '1984' is Taylor Swift revenge song

Katy Perry’s Dark Horse becomes 3rd music video to hit 1billion YouTube views!

Katy Perry adds fuel to Taylor Swift feud with new song ‘1984’

Katy Perry’s Super Bowl show

Katy Perry set for Grammys performance