Im in dance and we need some help...Read for more detail?

Okay, im in dance cl. And were doing a dance to "Boom Boom Pow" by the black eyed peas.We have some of the dance done. We need more ideas. Anyone have any moves? Also we need costumes. We will need low priced costumes. Maybe home made ones? Does anyone know wheere we can get acceseries? Or Whatever. i have been watching like videos of other people. I dont know if like taken a move from them will cause trouble?Or if its illegall. im only doing it for like a talent show. Its not gonna be everywhere.Thanks