John Mayer

Halsey and John Mayer have been flirting it up on Instagram, leading fans to believe they're more than just friends.

And the verdict is...

From Kanye West to Katy Perry, every time Swift has enacted musical revenge.

The enduring effect of 'Say cheese!'

The show will return to New York City in 2018 for the first time in 15 years.

The singer was expected to perform Tuesday night in New Orleans.

When Taylor Swift puts out a song, everyone has an opinion: The music critic, the die-hard fan, the hater (who's gonna hate, hate hate) -- and yes, the person who inspired the track.

Katy Perry and John Mayer were seen, once more, getting cozy during a Grateful Dead show.

John Mayer was asked by TMZ on the idea that his ex Katy Perry will be writing songs about him. "You're supposed to write songs. You're just not supposed to tell everyone you're doing it."

A single singer impersonating various other voices is, like, all the rage on YouTube right now. We've had an off-Broadway talent channel everyone from Demi Lovato to Alanis Morrisette in one tune and a guy singing 'Let It Go' in the voices of various Disney-Pixar characters. Now enter YouTube star Roomie, who impersonates everyone from Adam Levine to Fall Out Boy in his new video, 'One Guy, 14 Voi

Katy Perry and John Mayer's duet 'Who You Love,' which appears on his album 'Paradise Valley,' will be the singer-songwriter's next single. Since it's a single, it has to have its own accompanying cover art and it features the couple posing in romantic fashion.

Katy Perry and John Mayer are getting super serious, but as anyone who's followed their tumultuous relationship knows, they've had quite a few ups and downs -- including quite a few splits -- in between. Thankfully, though, those are behind them ... and they even inspired Perry's smash hit, 'Roar.'