Guns N' Roses bassist Duff McKagan performed with Mark Lanegan and the Gutter Twins at a benefit for Dave Rosser on Dec.14 in Los Angeles. 

Guns N' Roses bassist Duff McKagan performed with Mark Lanegan and the Gutter Twins at a benefit for Dave Rosser on Dec.14 in Los Angeles. 

Petra Haden

We’re always cool with a great cover of a classic hit, especially when involves two legendary rockers and it's for a good cause. On Wednesday (Dec. 14), former Screaming Trees and Queens of the Stone Age frontman Mark Lanegan performed with Guns N’ Roses bassist Duff McKagan at the Teragram Ballroom in Los Angeles. Their duet of choice? 1987 GN'R staple “It’s So Easy,” which they made look quite easy.  

The benefit concert raised money for Afghan Whigs, Twilight Singers and Gutter Twins member Dave Rosser, who is battling colon cancer. Queens of the Stone Age maestro Josh Homme later toned things down with an acoustic set. Check out the rocking duet below.