TWO AND A HALF STARS A wedding-band singer believes a former boy-band star stole his song. He could be right. COMEDY DRAMA IRELAND English #POWERBALLAD Starring Paul Rudd, Nick Jonas There’s a certain agreeable familiarity to POWER BALLAD, the latest from John Carney, who continues to refine his preferred recipe: emotionally wounded Irish souls, attractive American ring-ins, music as therapy and just enough whimsy to sand down any hard edges. Here the story revolves around