katy perry

Katy Perry and Niall Horan are engaged ... but in an Instagram photo only!

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.

When Katy Perry hit an L.A. karaoke stage with pal Robert Pattinson in 2008, little did she know she'd be talking about it now.

Another day, another cover for Katy Perry. The singer covers the December issue of Glamour U.K., with a feather in her cap, er, hair. The singer also flashed her dazzling smile and discussed her divorce from Russell Brand in the accompanying feature.

Congrats to Katy Perry, as her new album 'Prism' debuted at No. 1 on the Billboard Top 200.

Katy Perry, apparently forgetting her rise to fame involved talk of kissing girls and shooting whipped cream out of her bra, is taking other pop stars to task for nudity. Is she shading her BFF Rihanna or her Billboard competition Miley Cyrus?

Today (Oct. 25) is Katy Perry's 29th birthday, but she was the one giving the gifts. She performed at Lakewood High School in Lakewood, Colo., which was the learning institution that won the contest she launched in the summer. The performance was broadcast on 'Good Morning America,' so it was a wakeup cup of Katy Perry.

Katy Perry's new album "Prism" hit store shelves earlier this week.  As she gets ready for her 29th birthday tomorrow, Perry talks about her new album, marriage, kids and vulnerability.

Katy Perry covers the November issue of W. But it's not just Perry. It's Perry and her cleavage and her bodacious boobies. So it's all three of them gracing the cover. There's also a second, face-focused cover, pictured below.

Imagine Katy Perry performing a private concert for you. Sounds like a dream come true, right? For students at Cooper High School in Abilene, Texas, it just might come true!

Katy Perry's empire keeps growing.  The "Roar" singer has just landed another deal.  She's the new face of Cover Girl.

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.