Idolator — This week seemed to offer a something for everyone on Planet Pop! Lady Gaga premiered her music video for “Alejandro” (causing Katy Perry to premiere her own thoughts on the clip). Christina Aguilera dropped new album Bionic. Brandon Flowers’ f... more info

The Telegraph — Perry and Pixie Lott will appear as guest judges on the forthcoming series. more info

VH1 News — Katy Perry says she followed her "gut," and that has always worked for her, while recording her August album, Teenage Dream. more info

The Mirror — X Factor have announced Natalie Imbruglia is to be a guest judge on The X Factor - with Katy Perry and Pixie Lott also being lined up as temporary replacements for Dannii Minogue. more info

The Mirror — Katy Perry and Pixie Lott are to join the next series of The X Factor as guest judges. more info

Idolator — You saw the pics of Katy Perry on yesterday’s episode of Germany’s Next Top Model, and now—what you’ve been holding your hot N cold breath for, folks—here’s video of her performance. “California Gurls” is the current #1 single in the ... more info

BBC News - UK — Pop stars Katy Perry, Pixie Lott and Natalie Imbruglia will appear as guest judges on the next series of the X Factor. more info

ContactMusic — Katy Perry claims love has boosted her confidence.The 'California Gurls' singer - who is engaged to Russell Brand - no longer worries about other people's opinions... more info

MTV.com News — Katy Perry Followed Her 'Gut' On Teenage Dream By James Montgomery Katy Perry Photo: MTV News Katy Perry's upcoming Teenage Dream album isn't exactly the follow-up to her breakthrough One of the Boys — it's more like a continuation. The ... more info

MTV.com News — Religion professor Josef Sorett says Gaga's themes have long tradition in pop music.By James Montgomery Lady Gaga in "Alejandro" Photo: Interscope Lady Gaga's "Alejandro" video is so rife with religious imagery that you practically need a P... more info