The dance-flick franchise’s third installment sports its most eclectic soundtrack yet. Where else are Jesse McCartney and M.I.A. likely to meet? Not everyone brings their A game; T-Pain, in particular, appears to have phoned in his pair of contributions. But Flo Rida and David Guetta strike rave-pop gold on ”Club Can’t Handle Me,” and any opportunity to hear Jazmine Sullivan’s ”Bust Your Windows” is a welcome one. B?