Steve Hanns Voices in the Oaks Chorale invites all SaddleBrooke, SaddleBrooke Ranch, and residents of the Oro Valley community. The chorus will be performing a free Messiah sing-along on Dec. 17 at 3 p.m. at Oracle Center for the Arts and, again, a free performance at SaddleBrooke Ranch on Dec. 19 at 4 p.m. in…