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Kelly, a recent Grammy winner, will join Rascal Flatts for a group number. Already announced as performers for the big night are Kenny Chesney, Toby Keith, Carrie Underwood and more stars. Joining the list of presenters are NASCAR racing star Tony Stewart and actress Emily Procter from the CSI: Miami TV series. The ACM telecast airs live from the MGM Grand in Las Vegas, May 23, on CBS at 8 p.m. ET.