Everyone's favourite cartoon bad boy Bart Simpson has recorded a rap with a real life bad guy - 50 Cent.
The actress who gives Bart a voice has told Newsround that the rap single will feature in the next Simpsons series.
She says that 50 Cent was a huge fan of the Simpsons and a "pussycat"! She said his writing and rhythms were "brilliant" and the sound was "street".
The rap will be seen in the US in the autumn but we'll have to wait a while in the UK to catch it.
Nancy Cartright - the voice of Bart
'Do the Bartman'
It's not the first time Bart has ventured into the world of rap - he had a number one single with Do the Bartman way back in 1991.
It's not known if there will be any plans to release the new tune as a single so you'll have to keep watching to hear the unlikely duo's wondrous work!
Hear story
Watch Rachel Gibson's report
JK exclusive: why she loves The Simpsons
Check out The Simpsons message board
Vote: Who are you most like?
Try The Simpsons quiz
