It is the semi-final of Strictly Come Dancing, and tonight our couples perform twice in a bid to make it through to next week's Grand Final. It's the most challenging week for our celebrities as they master two brand new routines, hoping to wow the judges and win your votes at home. Settle in for a wonderful night of dancing - the Glitterball trophy is within touching distance for our remaining couples, and no-one wants to lose their spot in the final.