Pop Crunch — What happens when you take two wild musicians known for their sexual exploits and put them in a house together? Just ask Katy Perry’s neighbors. Katy has been dating rocker [...] more info

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

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

ContactMusic — Singer Katy Perry and her rumoured beau John Mayer dressed up in ghoulish costumes on Friday (19Oct12) for a star-studded party to mark her upcoming... more info

411 Mania — Trump gives Perry some friendly advice... more info

Perez Hilton — Looks like John Mayer won't ever be cast on Celebrity Apprentice. Days after advising Robert Pattinson to "not take back" Kristen Stewart, Donald Trump is warning Katy Perry about dating the lothario. The real estate mogul took to Twitter to share: ... more info

ContactMusic — Donald Trump has warned Katy Perry against John Mayer. The billionaire businessman has bizarrely taken to offering relationship advice, telling the... more info