Soccer star Cristiano Ronaldo [ Images ] has striped off for an ad campaign for a Spanish watch brand.

The 25-year-old forward is the brand new face and the celebrity spokesman for Spanish watchmakers Timeforce.

In the advertising campaign, he not only stripped, but also adopted a strange facial expression towards the camera as he flashed the watch.

He even managed to draw the attention away from stunning Spanish actress Elsa Pataky [ Images ], the female face of the brand.

"Any opportunity to bare his body is right up his street," the Daily Mail quoted a source as saying.