SIZZLING KELLY BROOK poses naked in her sauciest ever advert - for a pair of TRAINING SHOES. And the model`s sensational curves are sure to send fellas running for a cold shower. Kelly, 30 - who has just split from rugby hunk DANNY CIPRIANI - stripped off for billboard ads to boost Reebok EasyTones. Recently she romped naked, save for flippers, in a lesbian sex scene for upcoming film Piranha 3D. Let`s hope for similar feets.