Alyssa decided to teach Ashleigh the "Apache (Jump on it)" Dance.. I guess Alyssa learned this one at school at P.E. and had fun teaching Ashleigh it. If you notice, Garrett is in the background having a snack and playing with his Lego's and is having absolutely nothing to do with this craziness.
To make it that much more crazy, make note of the party lighting.. LOL