TMZ — Filed under: Madonna, Celebrity Justice A clothing company is taking legal action against Madonna , claiming the material girl has ripped off the "Material Girl" trademark. L.A. Triumph, Inc . claims in a new lawsui... more info

Idolator — Britney Spears uploaded another twitpic of her visit to the set of Glee, but this time she’s getting into character—and that character would be Madonna. Brit and Heather Morris, who plays Glee’s dimwitted Cheerio Brittany, recreate the “Me Ag... more info

E! Online — If the producers of Glee are going to "use somebody" for their music, don't count on these guys. While Coldplay, Madonna, Paul McCartney and Britney Spears can't wait to... more info

MTV.com News — Tour kicked off in November 2009 and will run at least through April 2011.By James Montgomery Lady Gaga Photo: Peter Wafzig/Getty Images There's a reason Lady Gaga doesn't ever seem to want to wrap up her globe-trotting Monster Ball Tour: I... more info

MTV.com News — Pop star tweeted a photo showing her and castmember Heather Morris sporting looks from Madonna video.By Mawuse Ziegbe Heather Morris and Britney Spears on the set of "Glee" Photo: Facebook It appears viewers may get a taste of Madonna in B... more info

Reuters — LOS ANGELES (Hollywood Reporter) - With everybody from Paul McCartney to Madonna clamoring to get their music on "Glee," at least one act is refusing to license its music to the TV show. more info

USA Today Music — 'Teenage Dream' makes a strong case that Katy Perry could be a truer creative descendant than Lady Gaga. more info

L.A. Times - Entertainment — Unlike the Madonna and Lady Gaga events, Spears will be a part of the episode titled "Britney, Britney, Britney," and she teased her fans with an on-set photo. more info

E! Online — Glee has already featured the poptastic likes of Madonna, Lady Gaga and Britney Spears, but creator Ryan Murphy isn't done yet! Here's what he just told us: He's... more info

ContactMusic — Joan Rivers has ridiculed Madonna for getting old.The 77-year-old comedienne attended the pop superstar's 52nd birthday party at London's exclusive Shoreditch House... more info