We've been waiting for this! Finally, we have a first listen of the track “She Used to Be Mine” from the Broadway-bound Waitress. Singer-songwriter Sara Bareilles composed the score for the show, which is playing at the American Repertory Theater through September 27, led by Tony winner Jessie Mueller. Bareilles will release a concept album entitled What's Inside: Songs From Waitress later this fall; the below number is now available as a single. Waitress (casting and dates yet to be confirmed) will open on the Great White Way at the Brooks Atkinson Theatre next spring.