We turn up the heat on this week's CMT Hot 20 Countdown. Tune in as we discuss the summer concerts you can't miss. Plus we'll tell you the multiple ways to nab tickets to the 2013 CMT Music Awards. Then get the scoop on the alter egos of Brian Kelley and Tyler Hubbard from Florida Georgia Line. And we'll debut our brand new segment, Hot 20 Fan Rant.