Which guest musician from the American hard rock band formed on Long Island, New York in 1969 appeared on Step Back?
Step Back (album):  It features performances by a number of guest musicians, including Eric Clapton, Dr. John, Billy Gibbons from ZZ Top, Joe Perry from Aerosmith, Leslie West from Mountain, and Brian Setzer from the Stray Cats. Mountain (band): Mountain is an American hard rock band that formed on Long Island, New York in 1969.
i don't know