411 Mania — They're loud... more info

Perez Hilton — Well… singers ARE told to PROJECT their voices! HA! Currently on-again couple Katy Perry & John Mayer have been spotted lately getting intimate alll around NYC, and most recently were cuddling up at Kaypers' halloween-themed birthday party… But i... more info

ContactMusic — Katy Perry has joined the long list of celebrities helping Barack Obama fight for a second term at the White House after signing up to headline a... more info

ContactMusic — Katy Perry kicked off her birthday festivities this weekend by throwing a predictably lavish costume-party at Los Angeles' Magic Castle nightspot.... more info

ContactMusic — Katy Perry appears to have mended her friendship with Kristen Stewart.The 'Part of Me' singer - who reportedly supported close pal Robert Pattinson... more info

Starpulse — Rapper Snoop Dogg is planning a collaboration with British singer Cheryl Cole on her next album. The "Drop It Like It's Hot" hitmaker has previously teamed up with stars including Katy Perry, Lil ... more info

411 Mania — Kristen Stewart joins Katy Perry and John Mayer at Perry's special costume-themed birthday party in Los Angeles... more info

Starpulse — Katy Perry performed a heart-warming duet of her hit "Firework" with 11-year-old Jodi DiPiazza, an autistic musical prodigy from Rochelle Park, New Jersey, during the taping for this year's "Night ... more info

Starpulse — Singer Katy Perry and her rumored beau John Mayer dressed up in ghoulish costumes on Friday for a star-studded party to mark her upcoming birthday. The "I Kissed a Girl" hitmaker, who will turn 28... more info

Perez Hilton — Sorry, Donald! Guess she didn't take your advice! Katy Perry will turn 28 this Thursday, and celebrated her upcoming birthday over the weekend by combining some of her favorite things this month: Halloween spookiness and her on-and-off man, John May... more info