“The Prom” (** out of four) was a bombastic musical adaptation of Matthew Sklar’s smash-hit Broadway show about a young girl (Jo Ellen Pellman) who is determined to take her girlfriend (Ariana DeBose) to the prom but the head of the PTA (Kerry Washington) finds out about this and decides to cancel the prom; elsewhere some Broadway legends (Meryl Streep, James Corden, Nicole Kidman) sense they can revitalize their stalled careers by helping the girl out. Lots of wall-to-wall music and singing and dancing (a few of the numbers especially at the climax are dynamite) but it’s all sapped by it’s weak storyline and is a lot of noise and flash over nothing. First-rate cast gives it their all but it still rings hollow.