On Amazon right now you can get the Just Dance 4 Video Game for Wii, XBox or Playstation 3 for only $19.99. This is the lowest price I have seen on this.
This game qualifies for FREE Super Saver Shipping with a $25 purchase or it ships free with Amazon Prime.
Thanks Common Sense with Money!
Note: Amazon prices and promotions can change at any time. The price(s) listed in this post is/are subject to change.