The next cheapest I can see is £8.97 @ Tesco ....

For an extra 10% Off Use discount code : STUDENT10%
Boogie to an all-new beat in this rhythm game for the Nintendo DS. Create and customize your very own Boog, then take the stage using the DS Touch Screen to showcase your best dancing moves. With 20 hit songs from over four decades, a variety of lovable characters, and three different styles of gameplay, Boogie is the must-have dancing party game for all ages to round out their DS games collection