Jimmy Kimmel always does a great job of producing content that's hysterical to viewers...especially "Mean Tweets." Well, after the CMAs last night, Jimmy released a music edition that had some familiar country faces on there, including Luke Combs, Luke Bryan and Midland. On top of THAT - he had Carrie Underwood do some undercover singing in Nashville ahead of the CMA Awards. She surprised fans that were shopping for the ever-so-popular "Buy two, get one free" or whatever the deal is. The reaction of the first lady is absolutely PRICELESS. Not sure about Carrie's improv skills, but nonetheless, it was so much fun to watch.