Pop singer, Beyonce Knowles is set to play a free concert at the London O2 Arena on November 15, 2009, according to nme.com. The singing diva will give away 13,000 free tickets to fans who chew Trident gum. Eligible fans must purchase a pack of Trident gum and enter the last four digits of the barcode into a weekly drawing. Each week, the chewing gum company will give away 1,000 tickets. Trident announced that they will also have additional VIP winning opportunities for the free concert.-LB