Hi what is the movie called that take place in the 80s high school?!

Hi what is the movie called that take place in the 80s high school?

Ok the story goes that it takes in the 80s in high school. A girl she likes a guy & this guy he into James Brown & dress like him too. So this girl in able make friends with him is to dress a boy. So then she dress a boy & becomes friends with a guy that she likes. Then end of the movie she confess that she is a women & she shows her boobs to him. What is it called?

2 weeks ago
Sorry I should check my spellings. She dress up to a boy. It takes place in the 80s in high school. The guys that she likes he is into James Brown.

Just One of the Guys