1. Katy Perry, John Mayer, Good Morning America

    Katy Perry and John Mayer Talk Duet "Who You Love" in First TV Interview Together

    Tue., Dec. 17, 2013 10:25 AM PST
  2. John Mayer, Katy Perry

    John Mayer and Katy Perry Debut "Who You Love" Music Video—Watch Now!

    Tue., Dec. 17, 2013 6:24 AM PST
  3. Katy Perry

    Katy Perry Suffers Onstage Disaster Before Performing on X Factor U.K.: Watch Now

    Mon., Dec. 16, 2013 3:52 PM PST
  4. Katy Perry

    Beauty Police: Katy Perry Roars With Princess Leia Hair and Stunning Makeup

    Mon., Dec. 16, 2013 11:34 AM PST
  5. Emma Roberts, Beyonce, Demi Lovato

    Beyoncé Releases Surprise Album on iTunes: Best Celebrity Twitter Reactions to Her New Music!

    Fri., Dec. 13, 2013 6:32 AM PST
  6. Katy Perry

    Katy Perry Looks Like Big Bird in a Puffy Yellow Coat

    Tue., Dec. 10, 2013 5:00 PM PST
  7. Katy Perry, Ellie Goulding

    Katy Perry and Ellie Goulding Enjoy Dinner Date Together in London—See the Pic!

    Tue., Dec. 10, 2013 4:43 PM PST
  8. Katy Perry, Marie Claire

    Katy Perry: Russell Brand Wanted Me to Have Children as a Way of Control

    Tue., Dec. 10, 2013 11:01 AM PST
  9. Katy Perry, Keith Hudson, Mary Hudson

    Katy Perry Banned Her Republican Parents From Attending Barack Obama's Inauguration

    Mon., Dec. 09, 2013 4:43 PM PST
  10. Katy Perry, Marie Claire

    Katy Perry Covers Marie Claire, Reveals "the Best Thing" She Got From Marriage to Russell Brand

    Mon., Dec. 09, 2013 8:14 AM PST
  11. Katy Perry, Taylor Swift

    2014 Grammy Awards Nominations: Katy Perry, Taylor Swift and More React on Twitter

    Sat., Dec. 07, 2013 11:02 AM PST
  12. Justin Timberlake, Jay-Z, Grammys, Performance

    2014 Grammy Awards Nominations: Justin Timberlake, Daft Punk, Kendrick Lamar, Taylor Swift, Robin Thicke & Lorde Rise, but Jay Z Rules

    Fri., Dec. 06, 2013 9:51 PM PST
  13. Katy Perry, X Factor Italy

    Katy Perry Rocks Flower-Covered Sheer Dress at X Factor Italy Show

    Thu., Dec. 05, 2013 7:17 PM PST
  14. Katy Perry, Niall Horan

    Niall Horan on Fateful NYC Encounter With Katy Perry: Who Doesn't Have a Crush on John Mayer's Love?

    Thu., Dec. 05, 2013 8:12 AM PST
  15. Katy Perry, UNICEF

    Katy Perry's Christmas Cape: Gotta Have It or Make It Stop?

    Wed., Dec. 04, 2013 1:01 PM PST
  16. Miley Cyrus, Wrecking Ball

    Listen to the 25 Biggest Hits of 2013 in Just 5 Minutes

    Tue., Dec. 03, 2013 2:01 PM PST
  17. Katy Perry, UNICEF

    Katy Perry Appointed U.N. Goodwill Ambassador

    Tue., Dec. 03, 2013 1:51 PM PST
  18. John Mayer, Katy Perry, Who You Love

    Katy Perry & John Mayer Unveil "Who You Love" Cover Art—Take a Look!

    Mon., Dec. 02, 2013 7:30 PM PST
  19. Katy Perry, Santa Claus Killer Queen Perfume Ad

    Katy Perry and Justin Bieber Release Perfume Ads Just in Time for the Holidays—Watch the Videos!

    Tue., Nov. 26, 2013 1:25 PM PST
  20. Katy Perry, Cheerleader, Down Syndrome, AMAs

    Katy Perry Brings Cheerleader With Down Syndrome to 2013 AMAs

    Tue., Nov. 26, 2013 7:07 AM PST
  21. Katy Perry, American Music Awards

    Katy Perry's Stylist Explains Geisha-Inspired Outfit at AMAs: We Love Japan!

    Mon., Nov. 25, 2013 5:23 PM PST
  22. Katy Perry, 2013 American Music Awards Performances

    Katy Perry's Geisha-Inspired 2013 American Music Awards Performance Sparks "Racist" Controversy

    Mon., Nov. 25, 2013 12:33 PM PST
  23. Taylor Swift, American Music Awards

    Taylor Swift, Miley Cyrus and Katy Perry Pass the Fashion Police Test at the 2013 AMAs

    Mon., Nov. 25, 2013 12:21 PM PST
  24. Katy Perry, American Music Awards

    Katy Perry Flaunts Pretty Polka-Dot AMAs Manicure—Watch Now!

    Mon., Nov. 25, 2013 9:40 AM PST
  25. Katy Perry, American Music Awards

    Katy Perry Opens 2013 American Music Awards in Full Geisha Outfit—See the Pic!

    Sun., Nov. 24, 2013 6:54 PM PST