Well what about Christina Aguilera's Dirrty music video. Or ass shaking in rap/hip hop music video. Or many other things done by other artists. I saw their video a few times. I don't really mind their hit single. The music video isn't that particullarly great. The girls aren't all that hot either. But hey, two chics making out, I mean common, it will obviously catch attention. See, it even worked on you. You're talking about them right now and promoting their song (since people who didn't see it will now want to check it out)