Monday night, Tina Fey visited her old pal, and former Weekend Update cohost Jimmy Fallon. There, she promoted her new movie Sisters and reminded us why she is remembered for Weekend Update rather than celebrity impressions. Fey is one of the most iconic alumni of Saturday Night Live, having spent nine years on the show, but not because she is particularly good at voices. In her wonderfully charming way, Fey indulged Fallon in a game of "First Impressions" and did her best Sofia Vergara. It's terrifically bad.