The latest news and hottest videos in country music are coming at you from the Music City Tower in downtown Nashville. Get ready for CMT Hot 20 Countdown. This week, we'll tell you how Jason Aldean is giving back with his Concert for the Cure. Plus, will Tim McGraw and Faith Hill record a new duet soon? Find out what McGraw has to say about a new collaboration with his wife. And with Luke Bryan's "That's My Kind of Night" hitting No. 1 last week, we'll flashback to another No. 1 from Bryan. Then we'll reveal our top country karaoke songs and some holiday recommendations you won't want to miss.