Don't miss this weekend's edition of CMT Hot 20 Countdown fro two bonus videos you're going to love. First Sundy Best explain why they're changed men in "Until I Met You," and Rascal Flatts try to capture the perfect night in "Rewind." Also on the show, we'll share some of our funniest pet stories, along with photos of some of your favorite stars' four-legged friends. Then see who makes the cut in our muscle man edition of High 5. Darius Rucker is giving back to the troops. Tune in to learn how you can help.