||Auditions for the 2019 Glenbrook Musical, “Mamma Mia!” will be held from 3:45 to 6:30 p.m. Tuesday, Feb. 26 at GBS and 3:30 to 6:15 p.m. Wednesday, Feb. 27 at GBN. Callbacks will be held from 3:45 to 6 p.m. Thursday, Feb. 28 and Friday, March 1 at GBS. No experience is necessary. A musical clinic will be held at 3:45 p.m. Monday, Feb. 25 in the GBS choir room. Students can pick up audition materials in the choral departments of each school, or at www.gbstheatre.com. Performances will be at 7 p.m. May 1-4 at GBS. Contact Mark Maranto or Josh Koo for more information.