Also in 2007, the group appeared on Shooter Jennings' (son of Waylon Jennings) album "The Wolf". This pairing would lead to "The Boys Are Back", released on May 19, 2009, and named for the title song written by Shooter Jennings. The project debuted at No. 16 on the Billboard Top Country Albums Chart and No. 77 on the Billboard Top 200. The album was produced by Dave Cobb, who was introduced to the group by Shooter Jennings. Reviews were mixed, but most praised the cover of "Seven Nation Army" by The White Stripes. 2010 was just as busy, including a cameo appearance on the History Channel show "Pawn Stars" episode "Packing Heat", which aired on December 13, 2010.