Forty-two years after Prince's "Purple Rain" exploded onto movie screens, producers announced this week that the stage version is landing on Broadway. Rachel Webb was a dynamic natural as Apollonia in the pre-Broadway premiere of "Purple Rain" at Minneapolis' State Theatre. Is it a jukebox musical, an adaptation of the "Purple Rain" movie or a concert with dialog and a convoluted plot? SongsJB: I appreciated how they plumbed Prince's catalog and added maybe 15 tunes beyond the nine on the "Purple Rain" soundtrack. To aim for that high bar, "Purple Rain the Musical" needs a massive makeover to make it on Broadway.