This week's edition of CMT Hot 20 Countdown is sure to please. Along with the hottest country music videos, we celebrate Dolly Parton's 70th birthday with hilarious highlights from the icon. Plus, Thomas Rhett, Brett Eldredge and The Band Perry reveal their 2016 bucket lists. Find out what they have their sights set on this year. Also on the show, the Brothers Osborne talk about their sibling rivalry, and Chris Young explores the ways of the force. Enjoy all this and much more Saturday and Sunday mornings at 9/8c.