We got to see the Marilyn death scene at the end. [cue the spoiler nazis.] But other than that, I'd be surprised if we saw any non-musical scenes of any significant length. The one possible exception I could see to that would be if there was something in the scene being performed that had some kind of parallel/relevance to something going on in the lives of the characters, such that the performance of that scene would drive one of the non-Bombshell plots. Much like the play performed during Hamlet.