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4. Kaley Cuoco and Ryan Sweeting

Kaley Cuoco had a busy 2013 summer. She broke up with Man of Steel star Henry Cavill, started dating tennis player Ryan Sweeting, then three months later they were engaged. Then, they tied the knot on New Year's Eve. Why wait, right? It's worth noting that before their real nuptials, they said fake "I dos" on Ellen DeGeneres' show.