I'll admit it. I'm an America's Next Top Model junkie. I'm not proud, but there you have it. While Twiggy was sweet and utterly likable as a judge, I have to admit that I prefer Paulina Porizkova behind the table. She's honest and doesn't hedge around when a photo isn't good.

Porizkova, 43, earned her spot behind the ANTM desk; she started her own modeling career in 1980 and is arguably one of the most successful models of all time. Porizkova also appeared on the fourth season of Dancing With the Stars -- an experience she says got her into the best shape of her life.

Porizkova chatted with Everyday Health about her fitness routine. She said she started exercising regularly after she quit smoking and gained a few pounds. She likes to take fitness classes such as karate and says that exercise has improved her mood as much as her body.