47. Garth & Kat: Christmas
Original Airdate: December 19th, 2009
The scatterbrained singing duo Garth & Kat, played by Fred Armisen and Kristen Wiig, brought real danger to live televison: If they always appeared to be inventing their holiday songs on the spot, it's because they were. "He definitely starts and I just try to follow," Wiig told Movieline. "We don't rehearse. The first time we do it that week is literally at the dress rehearsal." Armisen has referred to Garth as his favorite SNL character, and though Wiig has had several more popular characters, she has said that Kat was the "most fun" to perform. "So much of the show is writing, working, deadlines, trying to figure things out, punching up your sketch, knowing you're going to perform live," she said. "And that two and a half minutes of airtime is so freeing and fun."