How should i embarrase my boyfrined?

He does really embarrasing things in school like sing justin beiber ans missy eliot songs and idk just akward things. I tell him its embarrasing and he says he'll stop but he just ends up doing it behind my back! So i need to find something that i can do that will make him embarrased of me so he can see how it feels. And no im not immature, i just want to give him a taste of his own medicine.