Ubisoft announced last month that its Wii public humiliation simulator Just Dance had sold two million copies worldwide. Now, based on data from the March NPD report, analyst Ben Schachter estimates that one million copies have been sold in the US alone between the game's November release and the end of March. That's ... a lot of people loading up a cover version of "Womanizer" on their TVs.

236,000 of those copies of Dance were purchased just last month in the US. In contrast, Ubisoft's new Wii release, Red Steel 2, moved 50,000 copies (though it was released on March 23, in all fairness). We look forward to the inevitable knockoffs from other publishers. Anyone for a round of Strictly Toe Tappin'? No? How about We Wiggle Rhythmically? Or Dance Dance Revol -- oh ... right.