For 90 years, the American public has tuned into NBC to laugh, to cry, to cheer, and to gasp. From "Saturday Night Live" to the Olympics, NBC's programming has launched characters into legends and performers into household names. On Saturday, Feb. 19, Kelsey Grammer will host “The Paley Center Salutes NBC’s 90th Anniversary," live on NBC at 8pm. The show will feature iconic moments from late-night comedy, clips from Emmy-winning shows, and interviews with NBC stars, including Tiny Fey, Bob Costas, Jennifer Lopez, and William Shatner. In the meantime, check out the highlight's of the past ninety years of NBC programming, from "The Little House on the Prairie" to "The Fresh Prince of Bel-Air."