Justin Bieber Sings Medley of Hits During Carpool Karaoke on ‘Late Late Show’
Jessie J’s Backup Singers Wow With Cover of Her Hit, ‘Who You Are’
Vin Diesel Pays Tribute to Paul Walker, ‘Continues Healing Process’ With ‘Habits’ Cover
Taylor Swift Channels ‘Catastrophe’ for ‘Bad Blood’ Performance in ‘1989’ Concert
Watch How San Francisco Made Boy’s Wish Come True in ‘Batkid Begins’ Trailer
Katy Perry and Madonna Get Eyes Popping in Sexy ‘V’ Shoot
Iggy Azalea on How She Got Katy Perry to Give Her ‘Black Widow’
Katy Perry, Lorde, Robin Thicke, More Win at 2014 BBMAs
Did Lady Gaga Just Tweet Shade About Katy Perry?
Check out First Night of Katy Perry’s ‘Prismatic’ Tour: 15 Photos
Katy Perry Unveils ‘Prismatic Tour’ 25-Song Setlist
Did Rihanna Really Record With Katy Perry’s Ex?
Katy Perry Reveals Her Style Inspiration for ‘Prismatic’ Tour
Is Katy Perry Dating Diplo?
Katy Perry Throws World’s Worst Parties in ‘Birthday’ Video: Watch
Katy Perry Portrays Party Entertainers in ‘Birthday’ Video Preview
Katy Perry Plays ‘Who Knows Katy’ With Fan on ‘Kimmel’
Look-Alike Day: Which Two Celebs Resemble Each Other Best?
Candy, Cake, and Cookies Star in Katy Perry’s ‘Birthday’ Lyric Video
Vote: Which Hair Color Looks Best on Katy Perry?
Katy Perry Dyes Hair ‘Slime Green': Photo
Katy Perry Releases Cover Art for ‘Birthday’ Single
Mashup Monday: Katy Perry’s ‘Dark Horse’ vs Lady Gaga’s ‘...
What Does ‘Dark Horse’ Sound Like as ‘Gothic R&B/James Bond&...
Why Sia Decided to Keep ‘Chandelier’ for Herself
Katy Perry Responds to Miley Cyrus’ Harsh Tweet About Her ‘Ex Boo’
Miley Cyrus Blasts Katy Perry After ‘Tongue’ Remarks
Katy Perry Plays Weather Girl in Australia: Watch
Katy Perry Helps Deliver Baby in Living Room