10. Amy Poehler (2001-2008)
It was only a matter of time before the sexy SNL comedienne, who'd been cracking us up since 2001, blew up and moved on to bigger things. Since shifting over to her starring role in Parks And Recreation, Poehler's been honored with Emmy and Golden Globe nods. But her imitations will go down in Saturday Night history as some of its best. The actress committed hard and captured the mannerisms of political figures and music icons alike to a freakin' T. There was no holding it together that night she and Tina Fey reenacted Sarah Palin's interview with Katie Couric.