Summer is coming to an end and we're looking back on our favorite moments on this weekend's CMT Hot 20 Countdown. Tune in for fun times with Toby Keith, Jason Aldean and more of your country favorites. Also on the show, we sneak a peek at Jana Kramer as she rehearses for Dancing With the Stars, and catch up with Luke Bryan. Then Chase Rice recalls his glory days, we get to know William Michael Morgan, and Dolly Parton and Emmylou Harris talk about Trio's new release. See all this and more Saturday and Sunday mornings at 9/8c.