6. Miley Cyrus 

Hannah Montana no more, Miley Cyrus has come into her own and is turning heads everywhere she goes. This spring, the former Disney darling landed the #1 spot on Maxim's 2013 Hot 100 list. Her edgy new look – complete with teeny black bikinis and slinky jumpsuits – is miles from her clean-cut tween persona.{relatedarticles} 

The singer credits a gluten-free diet with helping her rock her killer new bikini body. In addition to the diet regimen, Cyrus keeps fit by dancing, regularly practicing Pilates, hiking and biking.