John Mayer

Between Lady Gaga, Carrie Underwood and Calvin Harris, these stars will keep you entertained — and you can watch their clips without having to leave Twitter.

Katy Perry is getting set to release a new song called '1984' that is rumored to be a big answer to Taylor Swift's 'Bad Blood'. Perry vs. Swift: Girlfight, round 23!

After narrowing it down to the Elite Eight, we’re now onto round three in our March Manness tournament.

Round one is done, now onto round two in our March Manness tournament.

Round one is underway in our March Manness tournament. We're looking for the sexiest man in music, sports, movies, and television.

Starting this Monday we're inviting you to take part in the biggest, hottest tournament March has ever seen.

John Mayer hosted CBS' Late Late Show a few nights this past week, and during Friday night's monologue he took a jab at his ex-love Taylor Swift, with a wink and a smile.

John Mayer surprised audiences on his Australian tour by performing an unexpected cover of Beyonce’s love song ‘XO.’ The singer and his fans enjoyed the performance so much that he just released a studio recording on iTunes.

Look, if I'd have had it my way Bryan Adams would have been on my arm for my senior prom.  But because YouTube wasn't available to me back in 1993 I had to settle for my high school boyfriend as my date.  It's so trendy now to have the courage to ask a celebrity to prom, and John Mayer is just the latest target.  At least Rachel Pollock's original song is a really cute invite.

A very talented guy decided to cover Katy Perry's 'Dark Horse'.  He did it so well, that he covered it in the style of 20 other artists; like Boyz II Men, Queen, Michael Jackson, and even Katy's ex John Mayer!

Juan Pablo Galavis has drawn so much negative attention that even John Mayer is weighing in with his two cents! (Who knew he was a secret 'Bachelor' fan?) Mayer took to Instagram yesterday, March 12, to share with fans his complete facial analysis of Galavis, who has been labeled "Worst Bachelor Ever" by fans and celebrities alike.

On, off, on, on, off. Up, down, up down. Katy Perry and John Mayer's romance sure is a roller coaster. Months after reports that an engagement was inevitable and weeks after Perry was seen wearing a rock on that finger, the musical duo is said to have split… again.