Kevin Clifton thrilled his fans with a throwback photo that showed him and his sister Joanne Clifton when they were at school.The two professional dancers clearly had moves even back then, as they posed as if they were just about to start a new routine!In the black-and-white picture, Joanne, now 36, wore a uniform of a V-neck sweater over a skirt and pleated skirt.Her older brother, now 37, wore smart trousers with a shirt and tie, as well as a blazer that appeared to be several sizes too