Just in time for the Olympics, kicking off tomorrow, Dizzee Rascal has released "Scream," one of the five songs soundtracking this year's games in London, his hometown. The way-upbeat track features Dizzee's protege, Pepper, wailing like a siren on the hook. A hodgepodge of clips from Rocky, festival crowds and a sweet hug between Dizzee and Jay-Z in the video above add to the motivational theme. "Scream" is officially for sale August 4th, but you can pre-order it now.