Rascal Flatts have revealed what many had already suspected -- that frontman Gary LeVox was lip syncing their performance of "Rewind" at Sunday's ACM Awards. The band tells TMZ that LeVox lost his voice last week after performing several shows and didn't want to cancel the ACM performance so he decided to use a little recorded help. The band says it's the first time they've ever done it. LeVox added, "We're obviously not very good at it."