I was about to write something about funny friends of mine who are in a new commercial, when the Internets opened up and unearthed this "oldie" from 1995, starring, as the admakers themselves put it: "a terrific young Second City cast member." They added: "It was her first commercial. She was very nice, very nervous, and very funny." (via Gawker.TV)
Here's their clip of Tina Fey hawking Mutual Savings Bank.
Or were they talking about this ad for 1-900-OK-Face?