Sign language

I´ve just seen the video on BS.com of this guy who´s doing Womanizer in "Sign language"... My parents are deaf and let me tell you one thing: He´s just doing something that looks like sign language (ok,some of the things are real sign language but 90% of it is not) to get klicks on youtube...
Here´s a real sign language interpretation of Britneys Hit-song "Piece of me". Not as spectacular as the half naked guy, but real sign language anyway... So if you´re interested in real sign language then watch this video ;)