Katie Holmes is looking to return to Broadway, but this time she wants to star in a musical, sources say. Holmes mounted a comeback in “Dead Accounts,” which closed ahead of schedule, but we’re told she’s interested in finding another theater project. After her play closed early due to limited interest, the idea’s finding some resistance. Sources say Holmes will work on recording some classic tunes with pianist Peter Cincotti. But a Holmes rep insisted of any musical aspirations, “Not true.”