Dierks Bentley and Jon Randall have been buddies for nearly 20 years now: They write songs together, hang out together and with their families and share a strong, mutual love of bluegrass. That mutual admiration led the two to co-write numerous songs for Bentley's 2010 bluegrass album, Up on the Ridge, including one of its singles, "Draw Me a Map."
In 1992, after three successful studio albums and a handful of hits, country duo Foster & Lloyd (Radney Foster and Bill Lloyd), disbanded. The critically-acclaimed pair pursued solo careers but reunited in 2010 and released a new album together, It's Already Tomorrow, in 2011. Ra...