Wii Fit girl - Lauren Bernat

This is Lauren Bernat, who has been "secretly" filmed by her boyfriend Giovanny Gutierrez in her underwear while wiggling her bottom to the Wii Fit. The 25-year-old shapely blonde has become a YouTube sensation. According to Metro, the 68-second video clip entitled 'Why every guy should buy their girlfriend Wii Fit,' has been viewed more than two million times.

"This is why I love Wii Fit. 'Nuff said."

Internet forums have speculated that the footage is viral advertising for the Nintendo's fitness video game.