David Letterman ShareTweetPinEmail People 8 / 12 Aubrey Plaza appears on David Letterman's show on Jan. 13, 2015. ShareTweetPinEmail Up NextParty People People 8 / 12 ShareTweetPinEmail By Wonderwall.com Editors 9:30pm PDT, Apr 27, 2009 Aubrey Plaza appears on David Letterman's show on Jan. 13, 2015. Spotlight