Naperville North's third annual all-day competition brings together show choirs large and small, mixed and unisex, for a pizzazz-packed invitational. Watch 20 high-school groups from Iowa, Nebraska, Indiana and Illinois get their “Glee” on, in half-hour segments beginning at 7 a.m. Following a dinner break, finalists compete at 7:45 p.m., with winners announced at 11:30. (Naperville North’s choirs perform too, but not for the title.) All together now, everyone: jazz hands! At Naperville North High School, 899 N. Mill St., Naperville. $15.