The Beat 12/10: 'The Hobbit' Music, Mariah Carey + Jimmy Fallon
The Beat 12/10: 'The Hobbit' Music, Mariah Carey + Jimmy Fallon

Welcome to the Monday, December 10 edition of "The Beat," Billboard.com's daily music news show, featuring host Jonathan Brooks running down the latest music news -- who's making headlines and who's topping the charts.

In today's episode, J.B. has the headlines about music for "The Hobbit," Mariah Carey's duet with Jimmy Fallon and the Roots, the 12-12-12 Hurricane Sandy relief concert line-up, Justin Bieber's Grammy snub, and more. Tune in below!

Be sure to come back to Billboard.com each weekday afternoon to watch a fresh episode of "The Beat."