Get together some old records or 8-tracks (or even tapes) of some "funny" old songs, also make copies of the words to the old songs.
Have the kids divided into groups, give them a few minutes to go over their routine and the words. Then have a talent show in the living room. Don't forget to video tape for funny music videos to watch afterwards. The kids would also love having some costumes to add to their musical numbers. Also if the singing is too much, just have them lip sing. Hope someone likes my idea! Teah