Kristen Wiig (2012)
Amy Poehler (2008)
Amy announces her departure during Weekend Update. But it wasn't all tears thanks to Fred Armisen.
Jimmy Fallon (2004)
Jimmy breaks in his final sketch, a cover of 'Summer Nights' from Grease.
Will Ferrell (2002)
Will's final farewell includes tributes from each cast member including a hilarious one from Tracy Morgan.
Update: The video previously posted was from the 2008-2009 season finale hosted by Will who covered 'Goodnight to Saigon' in the cameo-packed sketch.
Phil Hartman (1994)
A classic singalong for one of SNL's greatest cast members.
(Thanks to classicajays.tumblr.com for help with finding this video.)