As the TV sensation brings ballroom dancing to America’s living rooms, more and more couples are leading their reception off with classic, choreographed dance moves. Katharine McPhee and Nick Cokas did an elegant first dance to "The Way You Look Tonight" played by a 15-piece band, while Alyson Hannigan and Alexis Denisof broke into a wild spin to an obscure tune that Alyson loves called "No Tengo Dinero" by Los Umbrellos. A few tips: start your dance lessons at least one month in advance and keep your routine to three minutes or less.