John Mayer

Although Justin Timberlake and John Mayer differ greatly in the music they make, there's no denying that both artists are incredibly talented. Thankfully, both musicians have released new music this year, and as we enjoy it, we're wondering which singer is more swoon-worthy.

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.'

Off and on couple John Mayer and Katy Perry are firmly back on -- possibly permanently, if he has anything to say about it, because some sources are saying he's asked her to marry him.

Twitter is the celebrity oracle, allowing them to spout endless missives in 140-character lines. Some famous folk use it for good -- shameless self promotion, charity endeavors -- and others go on bizarre rants. Either way, a lot of celebs end up regretting some of their posts (or in some cases, all of them) and pulling the plug on the social media outlet entirely. But they almost always return. R

John Mayer and Katy Perry are back together in a big way. It's not only good for their careers (they keep gushing about one another to the press to promote their new albums 'Paradise Valley' and 'Prism'), but also for their hearts. Turns out, Mayer is even considering taking the next step with Perry. What's that step?

We can always count on celebrities to say things in public that many people would only be comfortable revealing to a best friend (if that). Whether it's intimate details about their sex lives or personal grooming habits, we're guessing the stars below are just so accustomed to having cameras and mics in their faces that they simply forget -- or just don't care -- they're always on the record. Rea

Katy Perry and John Mayer got back together just in time to promote their new albums. Isn't it great when romance is so convenient? The duo each have records coming out soon, and a track from Mayer's 'Paradise Valley,' called 'Who You Love,' has hit the web -- and it features none other than his on-again off-again love.

A random encounter with newly-reunited couple John Mayer and Katy Perry in a New York City guitar shop last week brought one lucky fan much more than just a great photo: Mayer actually bought the aspiring young musician a guitar on the sly.

For someone who likes to call his relationship "private" when asked about it, John Mayer had no problem gushing about Katy Perry onstage in front of a slew of cameras this weekend. It's almost like he had an album to promote or something!

In our least favorite couples trend, recently reunited duo Katy Perry and John Mayer showed off their patriotism in matching stars and stripes outfits. Blergh. Remind us again why it's disrespectful to let a flag touch the ground, but it's totally cool to wear it all over your body?

After two splits in under a year, Katy Perry thinks the third time with John Mayer will be the charm. To help hedge her bets a little, though, she's established some ground rules that we're sure he'll follow for a week or so.

Seems Katy Perry just can't stay away from John Mayer -- not only did she recently admit to Vogue that she's still "madly in love" with the singer, she was also spotted with her lips on his lips this weekend.

Katy Perry makes her debut as a Vogue cover girl in July, playing a high-fashion siren/farmer's daughter (we think). But in the accompanying interview, she talks about the loves of her life: ex-husband Russell Brand and on-and-off boyfriend John Mayer.

John Mayer has a new song out called 'Paper Doll' that may be a response to Taylor Swift's break-up song about him called 'Dear John.' And while John doing a song about Taylor who did a song about him is all very meta, even more confusing is the fact that Mayer teamed up with Prancercise creator Joanna Rohrback to demonstrate how to properly "romancercise" to the new song. We have stared

After they were seen canoodling at a party over Memorial Day weekend, rumors immediately ignited that Katy Perry and John Mayer were back together. While this was a rude assumption that assumed neither of them had the self-control to maintain a platonic friendship, well ... it looks like it's probably true.

Katy Perry has been a busy lady. In between platonic wedding-watching with Robert Pattinson, she managed to throw an A-list Memorial Day party -- and one of her invited guests was off-and-on boyfriend John Mayer. Cue the "oh no, not again" eye rolling.

Throat surgery seems to have gone very well for John Mayer. It gave him time to think about his life, prompting him to admit his wrongdoings to his many spurned ex-flames (even the ones who can't seem to get over him already). And now he's expanded his humanitarian efforts to those who really need it -- by helping fix up some veterans' homes in Louisiana.

In news that should be surprisingly to exactly zero people, Taylor Swift is still mad about that big mean jerk John Mayer dumping her back in the day. And the one thing that may bug her more than boys who do bad things (because nothing is ever her fault)? Losing at awards ceremonies. That said, the ACMs turned out to be a perfect storm of "stink" for Swift.

John Mayer and Katy Perry broke up despite being doting upon one another in public (even when dressed like this), so it came as a bit of a surprise when the news hit. But the reasoning behind the breakup isn't too shocking. New sources say it was mostly due to scheduling conflicts between the two pop stars. Despite, you know, them being able to afford private jets to take them to visit one another

Katy Perry is clearly bummed post-split with John Mayer, but we're not sure crying about it to her ex Russell Brand is the best way to get over it.