Just Dance

Just Dance is a music video game developed and published by Ubisoft for the Wii. It was released on November 17, 2009 in North America, November 26 in Australia, and November 27 in Europe. It is similar to the Dance Dance Revolution games in that dancers match moves on screen in order to earn points, but the method of game play is very different. In Dance Dance Revolution, dancers hit up, down, left, and right arrows on a dance pad (an additional Wii controller) with their feet to match the arrows scrolling by. In Just Dance, players use only the standard Wii Remote and attempt to mimic all the moves of the on-screen silhouette dancer. Players earn points depending on what moves they perform and how well they perform them.

Corrupt dancers
In and later dancers have vertical and horizontal lines across them. Refer.