To promote...something, Lindsay Lohan appeared on the Late Show with David Letterman Tuesday night. Letterman, of course, asked about Lohan's upcoming trip to rehab. "We didn't discuss this in the pre-show interview," she answered, clearly caught off guard. The rest of the interview is awkward, to say the least, though Lohan at least gets a halfway decent Dr. Phil burn in towards the end.

[via BuzzFeed]