Ay, mami! You know you're in for a treat the second the actress awkwardly ambles in over the horn music. In what might be Bella Swan's most infamous interview to date, the Twilight star at her best seemed stiff; at her worst, strung out on quaaludes.

While Letterman's jokes might not have been all that funny to begin with, they either seem to go completely over Kristen's head or acknowledged with a blank stare and a "right...right," bringing the weirdness to entertaining new heights. Just when you think things can't get worse, the host probes the actress about her plans to drive from London to Russia. Ack.