Rascal Flatts welcome Justin Bieber to country music.
Jake Gyllenhaal's birthday gift strums Taylor Swift's heart strings.
Tim McGraw searches for family on "Who Do You Think You Are?"
Darius Rucker, Easton Corbin and more join Country Thunder lineup.
Bela Fleck and his banjo re-imagine Christmas music.
Listen to the evolution of a Nashville country song.