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
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
Katy Perry Reveals Her Fast Food Indulgence
The pop star dishes about how she stays in shape ... and how she cheats
John Mayer Performs Live for First Time in 20 Months
"I'm a 70-year-old old version of myself," the musician says of his still-limited singing range
Katy Perry Shares Sultry Picture of John Mayer Dressed as Santa
She describes the picture of her boyfriend as "Santa Baby" on Twitter
Katy Perry Brings John Mayer Home for the Holidays
The pop star and singer-songwriter are "happy together," says a source.
