Spend Valentine's weekend with Brett Eldredge as the star drops by to co-host CMT Hot 20 Countdown. Also on the show, we learn Madonna has a crush on a country star. Tune in for the scoop. Then Cupid makes an appearance with a chance for you to score some cool goodies. And Carrie Underwood, Hunter Hayes, Dustin Lynch, Scotty McCreery and Cole Swindell take part in Celebrity Chain Mail. You won't want to miss their candid answers.