Perez Hilton — Wow! Check out the chemistry between these two! We have a feeling this is going to be goooood! Neil Patrick Harris just tweeted out a first look at the promos running this week to promote Katy Perry's guest spot on How I Met Your Mother. Super cute s... more info

Big Apple Music Scene — We're trying to decide if these Katy Perry promos for her guest spot on How I Met Your Mother are slightly more or slightly less irritating than those James Franco/Anne Hathaway Oscar ads. Probably less, right? ... More » Post from: Crushable Vi... more info

Yahoo! Music UK — world entertainment news - Soul sensation Adele prays she never becomes as famous as Lady Gaga or Katy Perry, because she doesn't want to be trailed by overzealous fans. more info

ContactMusic — Soul sensation ADELE prays she never becomes as famous as LADY GAGA or KATY PERRY, because she doesn't want to be trailed by overzealous fans.The British singer has just scored her second number one album in the U.K. and Europe with 21, the follow-up... more info

Pop Crunch — Add ditzy singer-turned-fashion mogul Jessica Simpson to the pot of contenders vying for a coveted judging spot alongside Music’s Meanest Man when The X Factor America premieres on FOX next fall. TV industry tattles thought European sweetheart and ... more info

Topix — For Katy Perry , her upcoming tour won't be just a musical and visual experience, but also an olfactory one too. more info

411 Mania — Katy's a hot-ticket item… more info

Perez Hilton — This is insane! We are very impressed! PerezHilton.com has learned that Katy Perry sold out several arena shows, including The Prudential Center in NJ and Nassau Coliseum in NY, in mere MINUTES on Friday! BOTH of Perry's Nokia Live LA shows also sold... more info

MTV.co.uk News — Katy Perry will allegedly strip down to her smalls for the front cover of the UK edition of Rolling Stone magazine. According to Monsters & Critics, the Firework singer will take part in a sexy... more info

ContactMusic — Katy Perry has admitted being on a diet "absolutely sucks".The 'Firework' singer is currently on a strict eating regime in preparation for her 'Teenage Dreams Tour' but revealed she occasionally lets herself have "cheat days" where she allows herself... more info