Harry "Headbanger" Bright, played by Joshua Schoen, sings and dances during the grand finale of "Mamma Mia" during Monday night's dress rehearsal at Coldwater High School. The cast will perform at the Coldwater auditeria at 7 p.m. on Thursday and Friday, at 2 p.m. and 7 p.m. Saturday and at 2 p.m. Sunday. Presale tickets are $8 for adults and $6 for students which can be purchased from Denise Petersen or at the high school office. Five show passes are $35 for adults and $25 for students. Presale ticket sales end Wednesday at 9 p.m. Tickets at the door are $10 for everyone.