The rhythm of the movement is detected by means of the Move controller and you get on the screen to see if you are at least right in time or not and whether the movements at least roughly coincide - for more movement then just missing the accurate tracking system of movements. But as the game anyway is a party game, it does not come to the accuracy of, but the fun can have on it.
Even as Note: The Dance package you can also download online, even for free. Only then when you want to actually dance songs, you have to pay extra for this well (ie you pay 2x in principle - even for singing and even for dancing). The songs on this addon can be but unfortunately did not buy online. So if you want absolutely Backstreet Boys or the young Michael Jackson dancing does not come to this game drumrum.
