Watch Jimmy Fallon Performing With Crosby, Stills, And NashWatch Jimmy Fallon Performing With Crosby, Stills, And NashJimmy Fallon probably has a better Neil Young impression than Neil Young. He was able to put it on display with Crosby, Stills, and Nash on Monday's (7/7) "Tonight Show."Dave "Wheels" WheelerDave "Wheels" Wheeler