Best Katy Perry Collaborations: 10 Surprise Hook-Ups

RIAA: Katy Perry Ties Whitney Houston As Overall Most Diamond-Certified Female Acts in History - That Grape Juice

Katy Perry grows up a little on 'Prism': 'I'm ready for my 30s' - Los Angeles Times

10 Best Katy Perry Songs of All Time

EXCLUSIVE: Katy Perry Talks Marriage, Madonna & Pseudo Lesbianism

Katy Perry's biggest collaborations including Rita Ora and Snoop Dogg

Who is more successful in music, Taylor Swift or Katy Perry? - Quora

Taylor Swift Katy Perry Friendship Timeline

Katy Perry Pulls Off Epic Surprise For Adorable 8-Year-Old Fan

Katy Perry Goes Red-Hot in Plunging Corset & Sandals on American Idol – Footwear News

Gwyneth Paltrow x Katy Perry: Our Turning Point