I haven't seen the show, so I can't speak for the specific songs, but Twelfth Night has always had a few songs in it. That said, because the melodies have never been written down, they change from production to production. Jeanine Tesori wrote the music for the most recent Broadway revival of the play, and won a Drama Desk for her efforts, and Philip Glass wrote the music for this production.
Is the music that pervasive? I mean, I love Twelfth Night in all its incarnations, but I'm interested to know where the songs fall. The movie's music is fantastic, and Ben Kingsley as Feste gives a great (as in appropriate) rendition of the song he's given in the actual script.
"Why, I make more money than... than... than Calvin Coolidge! PUT TOGETHER!"
~Lina Lamont
My name wasn't, isn't, and will never be Scott.