A second night of free concerts has been added to the list of events leading up to the Academy of Country Music Awards show in Las Vegas. As previously reported, Gretchen Wilson will headline the May 13 concert at the Fremont Street Experience. Others appearing at the concert following the ACM's charity motorcycle ride include Montgomery Gentry, Craig Morgan, Trent Tomlinson, Big Kenny, Emerson Drive and Heidi Newfield. The just-announced concert set for May 12 on Fremont Street will feature Trent Tomlinson, Trick Pony, Keith Anderson, Little Texas, Halfway 2 Hazard and others. The 42nd annual ACM Awards takes place May 15 at the MGM Grand in Las Vegas. The show will be televised live on CBS.