Katy Perry

See the photos of their uncomfortable revenge date!

The singer has been staying over her new man's L.A. home.

Move over, Miranda Kerr!

Plus, their almost run-in with Perry's ex John Mayer!

Are the two stars finally official?

Here is our list of some of the BFFs who, sadly, have headed for Splitsville.

The stars fueled dating rumors after getting cozy Sunday night.

Radar takes a look at other celebrities accused of being breaking out the claws.

Jeremy Scott and Katy Perry attended the premiere of 'Jeremy Scott The People's Designer' presented by The Vladar Company and Quintessentially at the TCL Chinese Theatre on Tuesday, Sept. 8, 2015, in Hollywood, Calif.

Oh, no she didn't! Katy Perry couldn't bite her tongue when she saw that her enemy Taylor Swift dared to take a thinly veiled dig at Nicki Minaj. The vicious feud between the singers was sparked after Minaj failed to get an MTV Video Music Award nomination for her "Anaconda" video.

Taylor Swift is in final talks to perform at one of the biggest events of the year, the Super Bowl! RadarOnline.com has learned that the NFL approached Swift’s team with an offer for her to headline the halftime performance at the sporting event next winter.

Dating again? Katy Perry and John Mayer enjoy a romantic night out in Disneyland – see the photos!

12 celebrities who are known for having the most extreme hair styles.

It's over already! Just two months after rekindling their romance, RadarOnline.com has learned that Katy Perry and John Mayer have called it quits yet again. Find out what went wrong!

Kim Kardashian, Katy Perry and others have been digitally altered to more of a plus-size look by artist David Lopera, and RadarOnline.com has a look at the shots.

Katy Perry Fighting With Boyfriend John Mayer Over Super Bowl Success

While Katy Perry wow-ed us with her halftime performance at the Super Bowl, she also took the opportunity to make a subtle jab in Taylor Swift's direction. See it to believe it!

Katy Perry put the cherry on top of a career night by getting the Super Bowl numerals “XLIX” tattooed on her finger, after her energetic halftime show Sunday.​

Katy Perry and her on-again boyfriend John Mayer love making sweet music together! So will he be joining her onstage for the most important performance of her life at the Super Bowl this weekend? A performance insider told RadarOnline.com what fans can expect.

Katy Perry’s friends are worried that she’s going to get hurt after reuniting with John Mayer for the third time, and they’re telling RadarOnline.com that she’s already “ignoring red flags.”

Katy Perry and John Mayer’s rollercoaster romance seems to have hit a high point yet again. After they were spotted out to dinner with friends earlier this week, RadarOnline.com can reveal that the couple secretly met up on Thursday for a steamy afternoon hotel hookup!

Katy Perry and John Mayer are dating again after breaking up in 2014. The couple was spotted having dinner and later enjoyed a sleepover.

The celebrities who rest assure that their millions of fans and followers are real may be in for a rude awakening. Yesterday, after achieving 300 million

From the Caribbean to the south of France the world is one massive playground for the rich and famous.

These are the 21 most outrageous celebrity feuds of all time.

There’s nothing like a celebrity feud, but Hollywood stars get just as much attention when they bury the hatchet with their enemies.

Katy Perry's rumored boyfriend, Riff Raff, was snapped over the Labor Day weekend getting wild at Moonlite Bunny Ranch in Carson City, Nev.

These celebrities are not twins separated at birth -- they just look like it! Here’s our list of stars who look so much like each other.

Many divas have appeared on Andy Cohen’s Watch What Happens Live, but one diva’s demands surpassed those of all the other superstar guests.

Katy’s friend DJ Diplo was smacked by Lorde after his jab at Taylor Swift.

Celebs attend Kate Hudson's Halloween Party

Bloomberg TV anchor Stephanie Ruhle and her family run Halloween!

Here are the 23 biggest music feuds of all time!

Neil Patrick Harris’ 15 Top Secrets & Scandals Revealed

Aww! A Katy Perry love letter that she wrote as a child is up for auction!

From Kim Kardashian to Britney Spears, which of these celebs look better with brown hair and which ones are naturally flirty, fun blondes?

Katy Perry is loving the time she's spending with DJ Diplo.

Singer Katy Perry pretty much admitted to bad blood with fellow musician Taylor Swift.

When Katy Perry’s away, Riff Raff will play! The off-color rapper spent a wild weekend at a famous brothel in Nevada with other women.

From the most heartwarming to the most awkward., ere are the best and worst from this year’s MTV VMAs.

Russell Brand hasn't been in the news since he allegedly dumped wife Katy Perry over text message on New Year's Eve in 2011- But now the controversial British

The singer's hair is starting to thin out. Is it stressed related?

The 'Twilight' actor is reportedly smitten with the 29-year-old singer and even hooked up with her at an after-party for his latest film.

The actor is looking to start dating again, but he could get stopped because Ryan Gosling’s girlfriend Eva Mendes is his top target.

The country singer rules the music world, but she’s now eager to be taken seriously in another area of show business, a source told Radar.

The 29-year-old “Birthday” singer sat down with raunchy comedienne and author Chelsea Handler to discuss her high-profile relationships.

Replacing one bad apple for another? Selena Gomez, 21- who dumped troubled ex Justin Bieber, 20, last month after she caught him texting her now-nemesis Kylie

Katy Perry likes to be taken care of while on tour, as revealed in a rider recently leaked online. According to a report from the UK's Daily Star newspaper,

Katy Perry’s rebound romance with DJ Diplo is going strong, but before it gets too serious the “Roar” singer will have to get the seal of approval from the