Singer Jason Mraz surprised fans at his concert in Los Angeles on Friday (29Aug14) by inviting his friend Sara Bareilles on stage for a special duet. The pair teamed up to sing Carole King's Beautiful, the title song from the Tony Award-winning Beautiful: The Carole King Musical. Mraz told the audience at the historic Pantages Theatre that the duet was an homage to their stage training, and his three-night residency at the iconic musical theatre venue.