Harris and son Gideon enjoy a fun day out in Brentwood, Calif. Plus: Jen & Justin, Camila McConaughey, Taylor Swift and more

IT'S A STRETCH

Bethenny Frankel – who's adding Skinnygirl Daily Nutrition Bars to her line of products – demonstrates how she keeps her slender shape at the SELF Workout in the Park event in New York City on Saturday. "I go to [celebrity trainer] Tracy Anderson once or twice a week, which is my new thing," Frankel tells PEOPLE of her fitness routine. "It's really challenging and tough, and it's getting me through a rough time right now."