Impressions-machine Kevin Spacey morphed into Jimmy Stewart to pay homage to his idol, Carol Burnett, who was on Colbert’s Late Show to promote the release of The Carol Burnett Show: The Lost Episodes. In true Stewart fashion, Spacey whipped on the specs and read a humorous, touching poem that praised Burnett for her everlasting contributions to comedy. Naturally, there were both lots of laughs, as well as tears, because Spacey nailed it.