Perez Hilton — Don't think GaGa won't bite back, Em! She IS Mother Monster after all! Check out Eminem's new song A Kiss featuring Royce Da 5'9 (above), in which Mr. Shady takes a low-blow swipe against Lady GaGa. He also pokes fun at Justin Bieber and Katy Perry i... more info

Perez Hilton — Exciting news for Katy Perry fans! Last we heard about Katy's California Dreams tour, she had added eight more stops in September, including San Antonio, New Orleans, and Tulsa! Now, Katy has added five November dates to her tour, which are as follow... more info

Perez Hilton — So saucy! Katy Perry, you look smokin'!! The singer was seen posing for the camera, wearing a cute pink outfit and aqua blue heels, for a photo shoot in Miami. Werk it! Russell Brand is one lucky guy! [Image via Mavrix Online.] more info

ContactMusic — N-Dubz' Fazer is writing tracks for Katy Perry. The 'Strong Again' hip-hop group's producer is hoping to branch out into the pop world, and write a huge hit for the US 'Firework' star. N-Dubz singer Dappy told the Daily Star newspaper "Fazer h... more info

Perez Hilton — Wow! Is that even really HIM?! We thought it was Billy Ray Cyrus! LOLz! After their Memorial Day trip to Mexico, Russell Brand and his wife, Katy Perry, were spotted on the Fort Lauderdale set of the former's new flick, Rock of Ages, alongside none... more info

Perez Hilton — Seems pretty clear to us that Cascada's new video for San Francisco shows us that the single has had some outside inspiration… Check it out and see for yourself, the video is right there! See? Also, somewhat HIGHlariously, the single is from Cascad... more info

MTV.co.uk News — Tulisa Contostavlos may have signed up to replace Cheryl Cole as a judge on The X Factor, but her N-Dubz bandmate Fazer is also planning his next move away from the trio. SEE TULISA ON THE X FACTOR... more info

Perez Hilton — What a fun way to spend the holiday weekend! Katy Perry and Russell Brand were spotted enjoying their Memorial Day in the town of Campeche, Mexico, where they explored the area and looked at some of the local art! Ch-ch-check out the photos (above)! ... more info

Big Apple Music Scene — • After a brief break-up and reunion in February, Ryan Philippe and Amanda Seyfried are reportedly splitsville, for good. (Celeb Dirty Laundry) • Check out the celebs who interned at well-known magazines either before they were famous, or, shock... more info

Gigwise — He's working on movie with Alex Baldwin... more info