11. Serena Williams
Source: Iconosquare
No one grunts quite as hot as Serena Williams. Built like a thoroughbred, this beautiful tennis star is part hurricane and part freight train on the grass and clay. One of the most accomplished players in tennis history, Serena also shines away from the game. Rocking tight dresses or loose-fitting sweat pants, she always manages to keep her hotness on point.