Katy Perry and Taylor Swift are Most Definitely Feuding
Watch Rare Footage of Katy Perry as a 16-Year-Old Christian Singer
Everything That Happened at the VMAs That You Didn't Know About
Listen to this Hilarious Remix of Katy Perry's 'This Is How We Do'
Katy Perry's New Video Is Weird, But Kind of Amazing
Katy Perry Calls Kim Kardashian Plastic in 'Rolling Stone'
Fan Reactions to Katy Perry's 'Dark Horse' Video
Your Grammy Awards Handbook
Katy Perry and John Mayer's New Video is a Sap-gasm
Watch Katy Perry 'Unconditionally' Video
How to Dress Like 'PRISM' with Your Friends this Halloween
Katy Perry’s ‘PRISM’ is Definitely New, and Pretty OK Too
New Music Tuesday: Katy Perry, Def Leppard, Justin Bieber and Cody Karey
Listen: Katy Perry’s Entire ‘Prism’ Album
FYI: Katy Perry’s ‘Roar’ Officially Drops, Naked Justin Bieber Plays Guitar
FYI: Katy Perry’s ‘Roar’ Cover, Robin Thicke’s Gospel Album
Katy Perry Releases Bollywood Version of California Girls
Katy Perry to Perform in India for the First Time Ever
Katy Perry "Part of Me" Music Video
Katy Perry Covers Kanye West's and Jay-Z's "Ni—as in Paris"
Rihanna on Katy Perry Collaboration: We're Working on It!
Katy Perry to Get Her Own 3D Concert Movie
Prince Harry Wants Katy Perry to Sing for the Queen
Katy Perry: "Part Of Me" Is NOT About Russell Brand
Katy Perry Might Land Dramatic Acting Role in Opera Singer Biopic?
Katy Perry Will Make "Real F-cking Dark" Music Now That She's Divorced
Katy Perry Donates Sales of New Single to Charity
Kat Perry to Perform For First Time Since Split From Russell Brand