The annual River's Edge Holiday Concert will be held Dec. 15, at 3:30 p.m., at Hudson High School, 69 Brigham St., and will continue the theme of Ghosts, Spirits and Past Lives. Performing in this popular concert, which has become a warm and festive community tradition, will be the 39-member-strong River's Edge Community Band; the growing River's Edge Chorale, which welcomes 45 local singers; and 20 talented local youth in the River's Edge Youth Chorus. Tickets are $14 for adults, $12 for seniors/students, and $10 for children under 10. Members save an additional $2 per ticket. Visit www.upwitharts.org or call 978-562-1646 to purchase tickets in advance online or by phone and save $1. Hudson High School is wheelchair accessible.