VIDEO : Kevin Spacey Surprises Carol Burnett With an Impression That Brings Her to Tears

When Kevin Spacey appeared on The Late Show With Stephen Colbert on Wednesday, he wasn't exactly himself. The actor showed up and channeled Jimmy Stewart to surprise Carol Burnett, who called Jimmy Stewart her idol. "I loved him so much," Carol said. "I grew up loving Jimmy Stewart as an actor and then as a person once I got to know him." From the looks of it, she also adored Kevin's sweet tribute, because she ended up in tears.