katy perry

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!

Patients and care givers at the Children's Hospital at Dartmouth-Hitchcock perform to Katy Perry's 'Roar'.  This is a moving powerful video.  I guess I should warn you that you should probably grab the Kleenex.

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

Katy Perry is pulling out all the stops to promote 'Prism' -- literally! The 'ROAR' singer takes a hands on approach to album sales in a new commercial for her third album's Wal-Mart exclusive edition.

Katy Perry's 'Unconditionally,' the second single from 'Prism,' is an upbeat, room-filling anthem about letting go and letting love into your life. But what is the song about on a deeper level?

Katy Hudson and Kate Hudson are BFFs! Wait, who's Katy Hudson? Oh, that's just Katy Perry; it's her real name. She was born Katheryn Elizabeth Hudson but uses her mom's maiden name professionally.

Katy Perry's second 'Prism' single, called 'Unconditionally,' isn't a 'ROAR' redux.

Katy Perry chatted about everything from comedians to competition to cartoons on 'Late Night With Jimmy Fallon,' leading up to her musical performance on 'Saturday Night Live.'

Bruce Willis has made plenty of headlines in recent months with his apparent disinterest in the spotlight, but will he be up to the task of hosting 'SNL' for the first time since 1989? The 'Die Hard' star will step up to the stage for this Saturday's follow-up to last week's Miley Cyrus outing, and the first previews at least bring us "The Return of Bruno." Ah, '80s humor.

Courtney Love has been in the business a long time, so she surely knows that one way to stay relevant is to talk trash about today's most popular artists.

Once again, Katy Perry impressed us with her fashion sense while abroad, this time in Paris. The singer donned a bit of a prim and proper, black and metallic pink, pencil-shaped dress to the 'Mademoiselle C' premiere party in the City of Lights earlier this week (Oct. 1). She's establishing herself as one fierce fashionista who doesn't need to rely on outrageous costumes to turn heads.

Katy Perry performed the brand new 'Prism' track 'By the Grace of God' as she closed out the iTunes Wireless Festival (Sept. 30). It was quite an emotionally rich rendition and it's clear that the song means a lot to the singer.