Brad Pitt bombs at box office, Jon Hamm and John Slattery prepare to direct and Howard Stern signs on for more America's Got Talent: See what Us Weekly's preferred partners are buzzing about in this Monday's roundup!

From Miley Cyrus to Kate Middleton, take a look back at 2012's awesome celebrity hairdos. (The Daily Beast)

Brad Pitt's Killing Them Softly flops at Box Office. (Zap2It)

Jon Hamm and John Slattery will direct more Mad Men episodes for season 6. (Vulture)

Bob Irwin, the son of the late Crocidle Hunter Steve Irwin, turns 9. See how big he is now! (toofab)

Watch Karmin perform "Sleigh Ride"in new holiday campaign for Coach. (Fashionista)

Comedian Katt Williams slaps Target employee in new video. (The Stir)

Howard Stern will return as a judge for a second season of America's Got Talent. (ET Online)

On the Road actor Garrett Hedlund tells Interview magazine he's more like Sal Paradise than Dean Moriarty. (Just Jared) 

Gerard Butler was prepared to beg Jessica Biel to be his costar in Playing for Keeps. (PopSugar)

This article originally appeared on Howard Stern Returns to America's Got Talent for Second Season