Ideas please!

It's standardized testing time again my friends! And this year I thought it would be awesome to add a teacher flash mob to our annual TCAP pep rally! A good friend of mine, also a teacher, did this at her school and the students LOVED it!  So I have the teachers, I can choreograph....but what song? I thought "I Gotta Feeling" Black Eyed Peas, "ABC" Jackson 5, what?!?! It has to be clean for school. And it has to a crowd pleaser. Something you can't listen to without moving. What do you think?