Katy Perry

The gold truck that Katy Perry hired to promote her upcoming album, 'Prism,' was hit by a drunk semi-truck driver.

Not understanding how jokes work, pop singer Katy Perry is none too happy about comedian and ex-husband Russell Brand making jokes about her and their former marriage. Even though, you know, that's how comedy works. And we have a feeling she won't like his most recent quip.

Katy Perry has long been a vocal fan of classic rock legends Queen, even paying homage to the band with the name of her latest fragrance, Killer Queen. However, she apparently also paid homage to someone else, according to the Beyhive: Queen Bey herself, Beyonce.

There was once a time when pop star Katy Perry would stick her neck out for her celebrity pals, but then being a nice person who helped others ended up being all for naught -- so she's given up her righteous ways. Thanks a lot, Rihanna. Way to ruin it for everyone.

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.

You may recall that multi-hued hair chameleon and singer Katy Perry was recently embroiled in a lawsuit with the company ghd (Good Hair Day), which dropped her contract because she's supposedly just not that popular anymore. Katy sued -- and now we know she won.

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.

Actor and singer Jared Leto is no stranger to drag, having dropped a serious amount of weight and shaved his eyebrows for a role in the upcoming 'Dallas Buyer's Club,' but looking like Katy Perry? Is most likely new to him.

Today (June 25) the celebs made wishes, screwed up at the drive-thru, skateboarded and lusted after Jan Brady -- among other things.

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.

Katy Perry is Vogue's July cover model, and as part of discussing what she does and doesn't like about herself, the 'Fireworks' singer was caught on video getting her makeup done -- partially by herself, but largely by a professional team.

Singer Katy Perry is friends with Kristen Stewart and Robert Pattinson, but when the collective Robsten broke up, Perry started spending a lot of time with Pattinson -- so much so that lots of people are wondering if they're hooking up. And Stewart is none too pleased.

In a quest to define her style, Katy Perry apparently confused a line with a Venn diagram. (Don't even get her started on isosceles triangles.)

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.

Now that Robsten has broken up, each respective member is handling it in their own way. And while Kristen Stewart is possibly having her life force slowly drained by Taylor Swift, Robert Pattinson is hanging out with good friend Katy Perry -- and stealing all the thunder from the wedding of a random couple.

Remember how Katy Perry, singer of binge drinking anthem 'Last Friday Night (T.G.I.F.),' called out rapper Chief Keef indirectly over Twitter after she heard his track 'I Hate Being Sober' on the radio? That didn't sit well with Keef, who isn't known for having the best judgment.