Head to the Ark in Ann Arbor for a night of great music that supports a great cause. Blackthorn will be playing on Sunday, March 25, 2012. This amazing Celtic band has been playing at venues around the Great Lakes region for decades. The concert at the Ark will support the American Cancer Society Cancer Action Network. Tickets are $20 and the show starts at 7:30 pm. For more information or to purchase tickets, please visit www.theark.org.