Sing That Thing!, WGBH's singing competition, wraps its fifth season celebrating the joy and diversity of choral music. Eighteen ensembles representing genres from barbershop and pop to gospel and classical have competed across seven episodes in three age-based divisions. Coaches Jared Bowen, Anthony Trecek-King and Annette Philip have selected two groups from each division to perform on tonight’s Grand Finale, when one group will be named the overall champion.

See who that will be tonight at 8pm on WGBH 2.