You'll be seeing stars when you tune in to this week's CMT Hot 20 Countdown as we travel to Austin for the iHeartRadio Country Festival. Don't miss our exclusive interviews with Carrie Underwood, Hunter Hayes, Luke Bryan, Florida Georgia Line, Lady Antebellum and many more fan favorites. Plus, get a peek at the festival and stay in the know about the latest country music news. Then find out who lands at No. 36 as we continue our CMT All-Time Top 40.