"J'ai pas vingt ans" (English: "I'm Not Twenty") is the sixth single by Alizée, released in June 2003.

The English version of "J'ai pas vingt ans" is "I'm Not Twenty".

"J'ai pas vingt ans" was remixed by Benny Benassi.

Dropping the "ne" is roughly similar in style to saying "I ain't twenty" in American English.

The music video is about Alizée and her band playing the song on a stage.