Lauren Froderman (R) and Allison Holker (L) on SO YOU THINK YOU CAN DANCE ©2010 Fox Broadcasting Co. Cr: Mathieu Young/FOX

The judges of So You Think You Can Dance will actually be dancing themselves on Nigel Lithgoe’s National Dance Day, Saturday, July 31.  Adam Shankman will risk his trick knee while Mia Michaels will dance like the wind, even if the mind is more willing than the body. 

Lithgoe will be going to Washington on that day to work with congress on a dance exercise program for overweight children.  Lithgoe reminded HollywoodOutbreak about the dance exercises some of us did back in the ’60s on the beach, looking silly, and not caring.

Click onto video to see what dances Adam Shankman, Mia Michaels and Nigel Lithgoe will be performing on National Dance Day.  And who won’t.