Katy Perry

Katy Perry is a superstar, but we haven't seen her as a superhero until now! Glamour has premiered an animated ad for Katy Perry's new perfume, Killer Queen's Royal Revolution. The cartoon is uniquely stylized and depicts Perry as a masked heroine during Medieval times who makes it her mission to save young women from an evil king.

Katy Perry is being sued by Christian rappers over her smash hit 'Dark Horse,' based on claims that she ripped off her song from their Christian gospel tune 'Joyful Noise.'

Katy Perry has done it all — she’s released platinum albums, toured all over the world, debuted a big-screen movie and signature fragrance. Now, the pop star is taking on another side of the music biz with Metamorphosis Music, a joint venture record label with Capital Records.

Katy Perry is no stranger to adopting hysterical personas for her music videos (remember Kathy Beth Terry from 'Last Friday Night'?), but she has gone all out in the vid for her latest single, 'Birthday.' While the lyric video was sugary sweet, this video is anything but, featuring Perry as five different party personalities all pranking a wide range of birthday parties.

Apr. 20, is a unique situation this year as the Holy Christian holiday of Easter and the (un)official day of marijuana both fall on this date today. We took a look at some of your favorite stars and the Easter wishes they're sending their fans, as well as a few 4/20 jokes here and there.

This weekend in "Listen & Win", you have the opportunity to earn 7,500 extra points each day!

When Lorde called in to Australia's 'Kyle & Jackie O. Show' last week, she did more than just craft the perfect retort to the hosts' implication that she was in a lesbian relationship with Taylor Swift. The 'Royals' phenomenon also revealed why she turned down the opportunity to open for Katy Perry on the 'Dark Horse' singer's upcoming tour.

Katy Perry, meteorologist?

Katy Perry is roaring back to the stage in her Prismatic World Tour this year and we want you to go!

A few months ago, an insider said that a Katy Perry and John Mayer engagement was inevitable and that they were on that path. Did they finally become betrothed?

Miley Cyrus, Katy Perry and Adam Lambert were all in attendance at Britney Spears' opening in Las Vegas at Planet Hollywood this past Friday night.  Eyes and cameras were on Cyrus as she goes crazy for Britney in the front row.

Katy Perry followed her somewhat embarrassing performance at the NRJ Awards in France, which saw her lip-sync out of tune before flipping the switch to live, at the finale of British 'X Factor' (Dec. 15). She delivered a memorable performance of her sweeping song 'Unconditionally.'

It is with a heavy heart that we report that Olivia Wise, the 16-year-old with an inoperable, aggressive brain tumor who previously covered Katy Perry's 'ROAR' in a recording studio has died.

The 2013 American Music Awards were rife with amazing performances from Katy Perry, Ariana Grande, One Direction, Rihanna, Miley Cyrus, Justin Timberlake, Christina Aguilera, Pitbull featuring Kesha and more. And you can catch them all here!

For the 2013 American Music Awards, our favorite stars dressed to the nines. While some singers, like Ariana Grande, opted to go ultra-glam, others, like Katy Perry, had fun with the red carpet. (We're still obsessing over her book clutch.) Check out the photos of this year's best dressed celebs.

The 2013 EMAs, held in Amsterdam today (Nov. 10), saw celebs in a variety of different outfits. There were more cute, edgy dresses than there were fancy, couture gowns, since it's a fun, less formal event. The stars dressed accordingly and they all looked faboosh in their own, unique way.

Get your Kleenex ready. A terminally ill teenage girl sang 'Roar' by Katy Perry, it went viral, and, well, yeah. It's heartbreaking and inspiring at the same time. 16-year-old Olivia Wise, suffering from an inoperable brain tumor, belted out the tune, and her loved ones made her Internet famous for it.

It was an all-star jam at Katy Perry's We Can Survive charity show in Los Angeles last night (Oct. 23). The singer invited her guests -- Tegan + Sara, Ellie Goulding, Sara Bareilles and Kacey Musgraves -- to join her. They all sang along on the the epic, anthemic chorus and did their thing on the verses!

Here's how we know that Katy Perry is going to love this newest video version of 'ROAR' -- because it's impossible not to!

Katy Perry was a tigress on the U.K. edition of ' X Factor,' performing on the show dressed like one.