2 Chainz and Kanye West have a very specific request in their new video 'Birthday Song,' which comes off like a modern version of Wreckx-n-Effect's 'Rumpshaker,' but with slightly less booty and more of a bizarre, artsy feel.

The song's hook is 2 Chainz insisting, "All I want for my birthday is a big booty h--," and the video builds on that theme. The stars of the five-minute clip are the girls endowed with generous backsides who wear tiny bikinis at 2 Chainz' birthday celebration.

The video is full of wtf? moments, starting with Kanye riding a bicycle with a giant cardboard birthday cake on the back. Kids make obscene gestures, a little person pops bottles, a clown gets attacked by an angry mob, and a girl covered in cake lies on a table while guests eat pieces of her, in a possible nod to Tom Petty's classic 'Don't Come Around Here No More' video.

'Birthday Song' appears on 2 Chainz's album 'Based on a T.R.U. Story,' which debuted at No. 1 earlier this month. The rapper loves to release music videos loaded with sexual themes -- his last clip was 'I Luv Dem Strippers' with Nicki Minaj.