John Carney is his own cover band in the affable, bland Power Ballad

John Carney is his own cover band in the affable, bland Power Ballad

In case you forgot that Paul Rudd’s a star, Power Ballad—an affable yet bland dramedy about a wedding singer who gets ripped off by Nick Jonas, who plays an ex-boy-band pop star—is here to remind you of his virtues. Rudd, and to a lesser extent Jonas, set the pace for this light and fitfully likable tribute to Gen X and dad-rock values, things like fighting for personal vindication (instead of money) and dedicating everything you do (creatively)…