Musicals Stripped Back: Waitress The Musical's Sara Bareilles and Katharine McPhee sing a duet.

Waitress The Musical's Sara Bareilles and Katharine McPhee sing She Used To Be Mine. Composer: Sara Bareilles In partnership with ‘Waitress The Musical’ showing in the West End at Adelphi Theatre. We have an exclusive upgrade on tickets from £19.50 timeout.com/waitress Click subscribe for more London musical moments.