Looking at last week's K-LAW Country Song Showdown results, it appears most of you prefer the 4-part harmony of Little Big Town over the 3-part harmony of Lady Antebellum. It wasn't even close - 92% to 8%. This week, CMA Awards co-hosts and past duet partners take on each other. It's Carrie Underwood with her new song 'See You Again' up against 'Beat This Summer' from Brad Paisley. Check out the videos below, then cast your vote. We'll keep the voting open on this Showdown open until Monday night, June 17th, at midnight.