1 / 10 Serena Williams

The tennis star has always been a staunch advocate of women having a healthy body image: “I want women to know that it’s okay. That you can be whatever size you are and you can be beautiful inside and out. We’re always told what’s beautiful, and what’s not, and that’s not right.” This month the sports star is the cover girl for <em>Essence</em> magazine's 'Body Issue'. She said in an interview for the magazine: "Before it was, 'Serena has a big butt,' and that was all," Serena told Essence. "Now there are way more people who feel comfortable with themselves and they're saying, 'I'm a woman, and this is what I look like.' I always say, 'We're popular now! We're finally in style!' "

PA