As if the finale number at Broadway's rockabilly hit Million Dollar Quartet weren't already dazzling enough, the show (which features real-deal music talents Eddie Clendening, Lance Guest, Rob Britton Lyons and Tony Award winner Levi Kreis as legends Elvis Presley, Johnny Cash, Carl Perkins and Jerry Lee Lewis, respectively) added another dash of live music magic on July 20. Blues king Guy Davis took the stage of the Nederlander Theatre in a surprise guest appearance. An acclaimed blues strummer and son of Broadway's own Ossie Davis (I'm Not Rappaport) and Ruby Dee (A Raisin in the Sun), Davis got a radio-friendly intro from show star and narrator Hunter Foster at the tuner's evening performance before joining the onstage jam session for an impromptu rendition of "Drifting Blues." Just another smooth Million Dollar move during the dog days of summer! Watch this to cool down with the coolest boys on Broadway during Davis' "Drifitng Blues."