I need help

Ok, it's about 1010 again. This class has a departmental final. One of the people who are teaching it has decided to organize math karaoke night for her students and the idea is that if they do it they can get 4-6% extra credit on their final. She has asked the other two instructors to participate. I dislike the idea. On the other hand, I do not want my students to be disadvantaged because I don't like the concept. So, although I don't like extra credit at all, I would like to come up with something that would put my students on equal footing with the others. Any ideas? Thanks.