Picture That Makes Me Laugh

Neither me or my friends could stop laughing when this photo was uploaded in facebook account of the photographer. I don't exactly remember what my friend and I were actually doing here, but the caption given was "karaoke session.. ~~" So we probably were singing (with that expression??) hahaha. At that moment, we discussed about Chinese TV Series "White Snake Legend" (the first video here), and while we were trying to sing the soundtrack, we got captured.
Oh wowww.. I still can't believe that I've ever made that expression on my face! :D