Yesterday I posted the baffling Hermain Cain ad that featured chief of staff Mark Block taking a drag from a cigarette and Cain breaking into a slow, creepy smile.

People enjoyed yesterday's Aubrey Plaza GIFs so much that I decided to post her appearance on Letterman last night.

The Late Show with David Letterman (CBS) -- Aubrey Plaza, AKA April from "Parks and Recreation," is tonight's first guest.

As I've stated before, I can't watch David Letterman due to the rage blackouts I suffer when I hear or see Paul Shaffer.

Harrison Ford gave one of the strangest late-night interviews of 2010 with his spaced-out appearance on "Conan," and now he's taken the lead in 2011 with last night's trip to Letterman's couch.

James Whittemore, a 22-year-old aspiring actor, was arrested early Sunday morning after he concluded a drunken bender by smashing the glass doors and lobby of the Ed Sullivan Theater, the home of "The Late Show with David Letterman.

Bill Hader of "Saturday Night Live" was a guest on "The Late Show" this week, and he talked with David Letterman about the genesis of his wildly popular Stefon character on Weekend Update.

Betty White turned 89 this week, and she celebrated by appearing on Letterman and admitting that one of her hobbies was "vodka.

In my long and extensive study of dog videos on the Internet, one of my all-time favorites will always be Mambo Dog (who is actually Merengue Dog, but "mambo" sounds better), who I first showcased here last fall before a different video of her circulated this summer.