Big & Rich, Cowboy Troy and Montgomery Gentry are among the artists who will perform a free show in Las Vegas on May 21, following the Academy of Country Music's third annual motorcycle ride. The concert will take place at the Fremont Street Experience and is open to the public. More artists will be announced soon. Artists participating in the ride include Little Big Town, Keith Urban, Van Zant and Chely Wright. The ACM Awards will air live on May 23 from Las Vegas on CBS.