Move over Gwen Stefani! Blake Shelton was heard complimenting someone else's rear end.... and we don't blame him! In a sneak peak clip for the next episode of 'The Voice', Blake and advisor Luke Bryan engagne in some flirty conversation! Blake tells Luke (who is known for wearing tight jeans), "Your butt looks good in your jeans, always. I love the fact that you act like you don't care, but you really do care. … I like your muscles. I like your summer body."