This Bollywood composer is a hit machine whose genius often lies in peppy simplicity. "Radio", from period piece Tubelight, marshals a thousand dancers to share its dial-twisting pleasure, while "The Breakup Song" (Ae Dil Hai Mushkil) adds dance-floor sizzle to splitting up. But beware of underlying danger in the romantic ballad "Teri Jhuki Nazar" (Your Downcast Eyes) from Murder 3.