Jimmy Fallon Does Impressions [VIDEO]

I have to admit that when Jimmy Fallon was on Saturday Night Live, I wasn't a huge fan of his.  However, now that he's a talk show host, I really like him.  Did you know he does some great impressions?  Here he is putting on a show on "America's Got Talent".

My favorites are Robin Williams, Bill Cosby, Gilbert Godfried, Steven Wright, and Adam Sandler.