Nell (top left), Gabby and Kenny Logan (top right), Rosemary Conley (bottom left) and Sarah Harding (bottom right) try out the Wii Fit

HMV spokesman Gennaro Castaldo said: "We think it's going to be one of the fastest and biggest-selling games of the year. Wii Fit is not going to get you totally fit but it is very good for muscle stretching and getting people a bit more active."

The new game builds on the success of Wii Play which allows users to play virtual tennis, baseball and golf.