Missy Franklin: Aside from Michael Phelps, there was no bigger story in the pool at the London Olympic Games than Franklin, the happy-go-lucky 17-year-old who took home four gold medals. She was a breakout star in 2012; she'll be the star going into the 2016 Games.

Missy Franklin: Aside from Michael Phelps, there was no bigger story in the pool at the London Olympic Games than Franklin, the happy-go-lucky 17-year-old who took home four gold medals. She was a breakout star in 2012; she'll be the star going into the 2016 Games.