NO PURCHASE NECESSARY. Void where prohibited. Open only to legal U.S. residents who are 17 or older. NBCChicago.com will give away up to three pairs of tickets to The Roots concert at the House of Blues in Chicago on December 4, 2010. The first set of tickets will be given away on November 29, 2010 between 9 AM ET and 9 PM ET. The second set of tickets will be given away on November 30, 2010 between 9 AM ET and 9 PM ET. The third set of tickets will be given away on December 1, 2010 between 9 AM ET and 9 PM ET. This offer is open to the first Twitter user who retweets NBCChicago.com's Roots Ticket tweet at the correct time. Limit one pair of tickets per household. Tickets will only be available while supplies last. Sponsor's decision cannot be appealed. Tickets are subject to certain terms and conditions as specified thereon. Location of seating (if any) shall be determined by Sponsor in its sole discretion. Attendees agree to comply with all applicable venue regulations in connection with prize. Total Actual Retail Value for all prizes, including shipping and handling, $63.