Remember back in May, when David Archuleta and David Cook of American Idol rocked out in their tighty-whities to Old Time Rock N' Roll for Guitar Hero? Well Activision Publishing is back in full force with their latest installment of their "Risky Business"-inspired Guitar Hero ads; a new commercial for Guitar Hero World Tour, which hits stores today. Directed by Brett Ratner, the commercial features big sports stars jamming — like Kobe Bryant (on the mic), Tony Hawk (on the drums) and Michael Phelps and Alex Rodriguez (on the guitar). A must see indeed!

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