Ke$ha is sexing it up in her new video for Blow and her leading man is none other than Dawson's Creek star James Van Der Beek. So random, yet brilliant!

The out-of-this-world video features unicorns, rainbows, guns and the 23-year-old pop star showing off her lady lumps. Mr. Van Der Beek even pulls a bra out of his shirt! You'll have to watch the insanity to understand that one.

At one point, Ke$ha refers to the 33-year-old sexy actor as "James Van Der Douche." His response ... “I don’t appreciate you slander-beeking my name, Ke-dollar sign-ha." Loves it!

Check out a much-younger James Van Der Beek from his Dawson's Creek days (with Katie Holmes)... after the jump.