Anytime time Kacey Musgraves hits the stage, you’re in for a treat. On her latest tour, she’s been pulling out a cover of Gnarls Barkley’s still-perfect “Crazy,” and recently, while on the Cayamo cruise, she tweaked it even more. Her version already added all kinds of twang to the song — which itself was inspired by spaghetti Western soundtracks — but, thanks to some assistance from Nickel Creek’s Sara Watkins, it now has lots and lots of fiddle. Kacey opens slow and steady, practically turning it into a melodramatic ballad, until that fiddle (and the rest of her band) gets going. Then we’ve got ourselves a party. Does that make Musgraves crazy? Probably.