He does a lot of impersonations dead on. He does the best Neil Young impersonation I ever heard in my life. If you heard it by sound alone it would be impossible to tell which is which
Bruce Springsteen And Neil Young Sing "Whip My Hair" (Jimmy Fallon)
What I find really funny about this one is that Fallon does a better Neil Young impression than the real Bruce Springsteen’s impression of himself. : )
Fallon also does a pretty good Bob Dylan.
"Bob Dylan Sings 'Charles In Charge'" - Jimmy Fallon (YouTube Presents)