It's party time on this weekend's CMT Hot 20 Countdown. Tune in as Kelsea Ballerini co-hosts the show and helps us celebrate our 200th episode. We'll talk about Ballerini's sophomore album, her first headling tour, her brand new single, "Yeah Boy," and much more. Also on the show, we sit down with the one and only George Strait, look back at some of our favorite moments from the past 200 shows, and get in the holiday spirit with Brett Eldredge's Christmas special. See all this and more Saturday and Sunday mornings at 9/8c.