Following his joint performance with B.o.B and Janelle Monáe at the Grammys, Bruno Mars is leaving fans with a special souvenir from the ceremony. The hitmaking crooner has released the doo-wop version of “Grenade” that he sang onstage, showcasing his live talents in anticipation of his upcoming “Hooligans in Wondaland” tour with co-headliner Monáe, kicking off May 4. Travel back in time by listening to the ’50s-inspired tune.