Most artists try to hide it when they lip-sync, but Garth Brooks is already admitting there's a good chance he'll be doing it at Sunday's ACMs. 

He's wrapping up a five-concert series tomorrow in Portland, Oregon, and he's pretty sure his voice will be shot by then. So, he already has a contingency plan for Sunday. 

He says: "Just in case we have to lip-sync, we taped a performance that was solely made for the awards show. So, we don't know if we're lip-synching or not, but my bet is, if I know Portland, we're not going to get out of here with anything.

"And then you've got to fly down and do that show immediately.  So we'll see how that's going to go."