Ronda Rousey, 28
2015 has been the Year of Ronda. The mixed martial arts fighter is undefeated in the ring (many of her bouts last mere seconds) and is said to be the most dominant female athlete in her sport ever; she’s earned an estimated $5 million from fighting this year alone. Her influence is broadening fast: She’s hit the big screen three times, with major roles in Furious 7, The Expendables 3, and the Entourage movie, and she’ll play the lead in a forthcoming remake of Road House. She made a surprise appearance with her friend Dwayne “The Rock” Johnson at WrestleMania 31 in March, delighting WWE fans. And she’s inspiring women everywhere with a recent speech about body image that’s been viewed 3.1 million times and was played on-stage by Beyonce in September.