Katy Perry Gets a Heart-Shaped Ring from John Mayer
Despite sporting a ruby on her ring finger, a source tells PEOPLE Perry and Mayer are "not engaged"
Katy Perry, Allison Williams Party with the Guys After Their Grammy Date
John Mayer, Selena Gomez and Lana Del Rey close down the Chateau Marmont after-party
Nicole Kidman, Beyoncé and Katy Perry Dance at the Grammys
Watch the stars groove to the music in the audience on music's biggest night
Katy Perry: Grammy Dress Code Violator?
Katy Perry's dress leaves little to the imagination, while Kathy Griffin brings the "inside boob"
John Mayer: My Relationship with Katy Perry is 'Very Human'
"I don't feel like I'm in a celebrity relationship," the singer-songwriter says
Katy Perry's Grammy Date? Allison Williams from Girls
It's a Grammy Girls date for Katy Perry and Allison Williams
Alex Morgan Channels Katy Perry's Sexy Album Cover Look
The athlete is featured looking every bit the "California Gurl" in ESPN magazine
Lauren Conrad: Katy Perry's Movie Made Me Cry
"I saw it on a plane and started tearing up," the former Hills starlet says
Katy Perry Reveals Her Fast Food Indulgence
The pop star dishes about how she stays in shape ... and how she cheats
