The headline band has been announced for the annual Moose's Tooth pizza anniversary party. It will be O.A.R. (for "Of a revolution"), described as a jam band along the lines of David Matthews. The band's 2011 album "King" peaked at No. 2 in the U.S. rock charts. Tickets, $40, will go on sale Tuesday for the outdoor concert, which will take place on Aug. 17. Details at beartooththeatre.inticketing.com or by calling 258-2537 or 276-4200.