By Brad Wete
Updated May 17, 2010 at 03:41 PM EDT

Sure, Russell Crowe can be a bit much at times. But that doesn’t mean he’s stone-faced and serious all day. Out promoting his latest movie, Robin Hood, Crowe — along with cast members Scott Grimes, Kevin Durand, and Alan Doyle — found a fun way to break up the monotony of their worldwide media blitz. They sang. Below, the quartet covers Sean Kingston’s 2007 teen smash, “Beautiful Girls.”

Check it out and let us know what you think of their crooning.

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