Rascal Flatts , Brad Paisley , LeAnn Rimes , Sara Evans and Nashville 's Charles Esten all take center stage on this weekend's MDA Show of Strength Telethon . Rascal Flatts' performance of "I Wish" and Sara's "A Little Bit Stronger" were both taped on the Grand Ole Opry stage. The traditional Labor Day weekend special raises money for the Muscular Dystrophy Association. You can catch this year's two-hour version this Sunday at 9 p.m. ET on ABC.
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