LONDON - FEBRUARY 20:  Mark Ronson and Amy Winehouse perform at The Brit Awards 2008 at Earls Court on February 20, 2008 in L
Mark Allan

Mark Ronson Releases Rare Amy Winehouse Demo
The producer and close friend of the singer shared a rough mix of "Back to Black" on his radio show [Prefix]

Watch Prince's Unauthorized Biography in Full
A 90-minute, 2007 documentary on the singer's life has hit the web [Prefix]

Bloc Party Reveal Tracklisting for new Album Four
UK rock band release video trailer to preview first new album in four years [NME]

Watch Barack Obama Sing Justin Bieber's "Boyfriend"
Sorta. Just watch