Starting tonight, fans can visit http://imeem.com/britneyspears to listen to Circus, in its entirety, one week before its official release on December 2nd, Brit’s 27th birthday.  You can also check out videos and playlists of Britney’s hits, including her latest single, “Womanizer.”

For this, her sixth studio album, Britney has enlisted a stellar group of established producers/writers that include Dr. Luke (who wrote and produced the album’s title track, “Circus”), Danja, Max Martin, Bloodshy & Avant and Guy Sigsworth (Madonna, Alanis Morissette, Bjork).

Using imeem, fans can embed Circus on their blogs, web sites, and profiles on Facebook, MySpace and other social networking services.  For the embed code, go to: http://www.imeem.com/britneyspears/playlist/XT-b3ZKs/britney_spears_circus_music_playlist/

View Britney’s Circus promo photos here.