Sarah Harding and Nell McAndrew strike a wee pose

The word among tech heads is that Nintendo’s new girl-friendly game Wii Fit will be the biggest-selling game of the year.

In a preview on London’s South Bank, organisers used a host of famous faces to demonstrate this latest innovation in home fitness using an open-air exercise studio.

Girls Aloud singer Sarah Harding and do-gooder glamour model Nell McAndrew joined the exercise class at Oxo Tower Wharf.

And group classes – hosted by health and fitness expert Rosemary Conley – were performed throughout the day to try and convince passers by to ‘keep fit in a fun way’.

News presenter Gabby Logan and her husband rugby union footballer husband Kenny also joined the tech exercise spectacle.

Wii Fit - which offers 40 different aerobic, yoga, muscle and balance exercises – will be launched across the nation on 25 April.