Students auditioning for their high school's production of Mamma Mia! go head to head to secure a spot in their coveted spring musical. Students auditioning for their high school's production of Mamma Mia! go head to head to secure a spot in their coveted spring musical. Students auditioning for their high school's production of Mamma Mia! go head to head to secure a spot in their coveted spring musical. Students auditioning for their high school's production of Mamma Mia! go head to head to secure a spot in their coveted spring musical.