The Doobie Brothers have unveiled the guest list for their upcoming country tribute album Southbound.

According to guitarist and singer Patrick Simmons, the group was surprised to hear they had so many fans in the genre:

"The artists picked the tracks. It's a best-of, if you will, but it's re-done by incredible Nashville players in the studio, who were incredibly good and fast . . . I was just blown away at how efficient and good they were."

The guest list includes Brad Paisley, Blake Shelton, Zac Brown Band, Toby Keith, Chris Young, Charlie Worsham, Sara Evans, Jerrod Niemann, Amanda Rivera and Love & Theft.

"We were kinda blown away that these folks would be interested in jumping on board with us, but they were eager to do it," added Simmons.
Southbound hits November 4.