Gigwise — She races towards fellow singer... more info

MTV.com News — Spears is the world's top tweeter, but Gaga is hot on her heels.By Mawuse Ziegbe Lady Gaga Photo: Kristian Dowling/ Getty Images Lady Gaga's near-dominance of all things social media is reaching a pivotal point: Mother Monster is poised to ... more info

The Mirror — Britney Spears is all smiles after her first day on the set of Glee. more info

Pop Crunch — From Britney Spears to Jennifer Lopez — Some of the biggest names in pop today would part with one of their platinum plaques to have their songs performed by the cast of Glee. Except, of course, those guys from Kings of Leon.The Grammy-winning band... more info

Gigwise — Singer joins cast for one-off episode... more info

Pop Crunch — Eww! Britney Spears smells about as appetizing as a garbage pail and the singer’s boyfriend — manager Jason Trawick — has reportedly warned the “Toxic” crooner to clean up her act and start changing her clothes and washing her hair more oft... more info

VH1 News — Britney Spears gave a Twitter update about filming her "Glee" guest spot; "What's up GLEEKS? Having so much fun on set!!" Spears wrote. more info

Perez Hilton — She's adorbs! Britney Spears Tweeted a photo of herself in all of her glorious gleek-dom accompanied with the message: "what's up GLEEKS? Having so much fun on set!! Can't wait for you guys to see the episode! -Britney" We can't wait, either! P.S. CL... more info

Mjsbigblog — Britney Spears Has ‘So Much Fun’ on Set of Glee Look! It’s Britney Spears on the set of Glee! With her assistant Brett. Britney posted excitedly on her twitter page earlier today, “About to do my first shot of the day for... 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