Keith, Pickler, Rimes Perform at ACM Awards

5/9/2008 Kasey Bell The ACM Awards are always a big show, and the 2008 show just got a little bit bigger.    Country Music superstars Toby Keith, Kellie Pickler and LeAnn Rimes will be performing at the ACM awards show.  Also, Kenny Chesney and George Strait will be performing their duet “Shiftwork” for the first time live.    These artists join many 2008 ACM Award presenters and performers, including Clint Black, Sara Evans, Lady Antebellum, John Rich, Carrie Underwood and Trisha Yearwood, who will also be making special appearances.  The 43rd ACM Awards air live on Sunday, May 18, at 8:00 PM ET on CBS.