It's a Boy Girl Thing

It's a Boy Girl Thing is a movie starring Samaire Armstrong, Kevin Zegers, and Sherry Miller. Sworn enemies find themselves in each other's bodies, and use this to ruin each other's lives.
A visit to a natural history museum proves catastrophic for two high school rivals, an overachiever and a jock, when an ancient Aztec statue casts a spell that causes them to switch bodies and see exactly what it's like to walk in the other's shoes.