Just Dance Research

Just Dance is a music video game developed and published by Ubisoft for the Wii. Developed in the headquarters of Ubisoft Entertainment: Montreuil - sous - Bois. Ubisoft Paris, the french independent video game developer, founded in 1986 is now as of 2008 the 3rd largest independent video game publisher and developer in Europe and the 4th in America. They have studios in 17 countries and subsidiaries in 28 countries. 
On November 27, 2009, they released their new game "Just Dance" for the Nintendo Wii on an optical read only laser disc. This means it can only be played on the Wii, no other consoles. 
This media convergence uses the classic Wii controller and the players must mimic all the moves of the silhouette dancer on screen. They earn points depending on which moves they perform and how well. 
There are a few different modes available to go with the 32 tracks:

Duet Mode. Created for more interaction and role playing between players.

Dance Battle Mode. This mode will let you play with up to 8 players in a pass the Wii-mote style. Individual scores will count towards the overall result of the team. 

Party Mode. The Just for fun mode!  For all the dance fans, it’s as simple as that, you just play as much non-stop music as you want.

Just Sweat Mode. Exercise and have fun at the same time! The Just Sweat Meter measure's how much energy you are actually putting into the  dancing and it also includes the option  to define daily and weekly objectives for your dancing sessions to track your progress.

Just Dance received mixed to negative reviews from critics, with an average rating of 49/100 on review aggregator website Metacritic. The game was criticized for having no unlockable features, songs, or dancers and no progression. The controls and grading system have been criticized as "sloppy", with the detection of player movements being substandard.

However, in terms of sales, Just Dance performed strongly, becoming Ubisoft's most successful Wii release ever. Despite the poor critical reception, the game was the fastest selling third-party Wii game ever, selling two million in its first four months. Ubisoft described the sales performance as "overwhelming". As of December 2010, Just Dance had sold 4.3 million worldwide, making it the second-highest selling Wii game from a third-party publisher behind Ubisoft's sequel, Just Dance 2.

As a result of the popularity, Ubisoft have released more Just Dance titles to appeal to a wider audience. To date the entire lineup of Just Dance titles – Just Dance, Just Dance 2 and Just Dance Kids  - have sold more than an estimated ten million units worldwide. Also the Just Dance, Michael Jackson: The Experience has surpassed two million units sold.