Alabama, Kenny Chesney, Merle Haggard, Alan Jackson and George Strait are among the stars to appear when the Academy of Country Music celebrates its 40th anniversary with a TV taping in Las Vegas. Brooks & Dunn, Barbara Mandrell, Reba McEntire, Montgomery Gentry, Rascal Flatts and Trisha Yearwood are also on the bill for the event that takes place May 18, the night after this year's ACM Awards show. The anniversary production will be taped for a CBS special to be televised in December. Tickets to the anniversary show at the Mandalay Bay Resort & Casino are available from Ticketmaster. The ACM Awards show airs live on CBS on May 17.