PHOTOS: Jessica Simpson Hits the Gym

A decidedly chipper and upbeat Jessica Simpson shows off her skills at making goofy faces while leaving the private West Hollywood gym of celeb trainer Harley Pasternak on Wednesday.

As reported in the new issue of OK!, Jess has been slimming down since having her heart broken by former beau Tony Romo on the eve of her 29th birthday earlier this month.

“Working out is helping to give her focus and clear her head," a pal of the star tells OK!. "It’s better than sitting around moping or throwing pity parties with ice cream sundaes.”