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As the newest judge on True Beauty, Beth Ostrosky Stern knows the importance of looking and feeling good.

But the avid runner admits that a rigorous exercise routine isn't enough to keep her body looking fit.

"I still worry about my diet," Stern, 37, told at the New York Magazine kickoff Tuesday. "I don't eat any sweets -- I do eat big pasta dinners, though!"

So how does she keep her body in shape?

"I ran the NYC marathon a couple years ago and since then I've run probably 25 miles a week," she told Us. "I'm a runner."

But don't expect the reality TV judge -- who married radio host Howard in 2008 -- to carefully select the perfect playlist to go along with her workouts.

"I don't listen to any music when I work out. It distracts me!" Stern told Us. "I don't even have an iPod." See the top 10 sweat-drenched workouts.

And Stern will be undoubtedly be flaunting her bikini body this summer when she and Howard move into their recently purchased beach house in the Hamptons.

"[We love to] take beach walks. We always take walks and fill trash bags with balloons and bottles that have fallen on the beach," Stern said. "That's our favorite thing to do, to see who can collect more."