YOU SAID:

All I wanna do is have some fun

INTO JAPANESE

私がしたいのは楽しいことだけです

BACK INTO ENGLISH

All I want is fun

INTO JAPANESE

私が欲しいのは楽しいことです

BACK INTO ENGLISH

What I want is fun

INTO JAPANESE

私が欲しいもの楽しいです

BACK INTO ENGLISH

What I want is fun