Funny song for me to sing?

My school does this thing called friday night live where people reenact snl and mad tv skits or just do funny stuff.... my theatre teacher wants me to sing the lunch lady song, but i really don't want to do that, so she told me to find another funny song to sing. any ideas? must be school appropriate, and something I could find the guitar chords to, possibly by tommorrow...:) THANK YOU! i really need help.