It's party time on this weekend's CMT Hot 20 Countdown. Tune in as we celebrate the Grand Ole Opry's 90th birthday with help from Florida Georgia Line, Scotty McCreery, Kellie Pickler and Frankie Ballard. Find out what the historic venue means to the artists and enjoy an exclusive look around. Also on the show, Tyler Hubbard tells us about his bachelor party, and we go behind the scenes of Keith Urban and Eric Church's video, "Raise 'Em Up." Then find out what happened when Brad Paisley tried his hand at stand-up comedy and we'll tell you what made Dwight Yoakam break out his dance moves. Enjoy all this and much more.