Katy Perry

From unknown rock acts that went on to be global superstars to legends in their field who were just looking to find a new audience, let's take a look at 15 unexpected Warped Tour acts from over the years.

We're breaking down what went wrong!

The ‘Firework’ singer’s space trip is sparking serious drama between them.

After nearly a decade together, Katy Perry and Orlando Bloom might be heading for a split.

Katy Perry is getting made fun of online for her Lifetime Tour vocals, costumes and dancing. Find out why.

Where's the beef? We found it finally—on X, formerly Twitter.

And yes... she sang in space.

She performed at Jingle Ball in New York City on Dec. 13.

Obvi, Cher made the list!

The famous celebrities appear to have ties to the occult. Allegedly.

These are scarily accurate.

A source says Underwood was not producers' first choice.

The doe-eyed pair of Zooey Deschanel and Katy Perry have long been confused for one another, but we have a helpful tip for telling them apart. If the person in question is dressed like a cross between a hipster and a 1950s housewife, it's Zooey Deschanel. If she's wearing hot pants and looks like she might have stolen the clothes off a cartoon character and/or drag queen, it's Katy Perry. You're w

Want to amp up an ensemble this fall? Look no further than a pair of strappy black heels! This shoe is perfect for a night on the town, or even if you want to dress up a pair of skinnies.

Celebrity paraphernalia is a hot commodity. Whether it's something worn by a star or used as a prop in a movie, television show or music video there is definitely a market for remembrances of pop-culture. Sometimes, however, that line can get a bit creepy, be it something that contains a celebrity's bodily fluids, was once worn on an intimate part of their body or was consumed by them. Or, you kno

While it's probably more common than not for celebrities to legally protect their money before walking down the aisle, many say "I don't" when it comes to prenups. Sometimes it's because they got married well before fame and fortune came to call, sometimes it's because they simply find such paperwork distasteful, and other times ...

Katy Perry's new music video for her single 'Roar' is a jungle adventure featuring big cats, elephants and monkeys, and it has angered the animal rights organization PETA.

Courtney Love has had her share of controversy, so it's to no one's surprise that the former Hole frontwoman had something to say about the 2013 MTV Video Music Awards -- specifically about two of the night's biggest performances from Katy Perry, who boxed and did the mildest of choreography, and Miley Cyrus, who twerked on Robin Thicke's crotch.

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.'

Happy Friday! Today (Sept. 6), stars were arrested, took tumbles, joined Facebook and shared all manner of things from their upcoming tours to their poetry to their album artwork. Basically, just your average day in the world of celebrities on the Twitters.