Willie Nelson & Snoop Dog 'Superman' on Letterman

Elien Becque

Snoop Dogg and Willie Nelson performed 'Superman' last night on Letterman, a single on which the two collaborated for Snoop's recently released Doggumentary. Nelson apparently wrote the lyrics while recovering from carpel tunnel surgery and the opening line – "Too many pain pills, too much pot/trying to be something that I'm not" – sets the tone for an endearing ditty about living the good life while getting old.