PHOTO: Jessica Simpson struts her new slimmed-down stuff at JFK Airport. (Splash News, splashnews.com)

Jessica Simpson displayed her sexy new silhouette in tight black leather pants as she breezed through LAX on Jan. 28!

The mom of two infamously gained a reported 70 pounds during her first pregnancy, so she decided to become a spokeswoman for Weight Watchers. Clearly, the partnership is a win-win for everyone!

Following the recent release of her latest ad for the company, in which Jessica displays her significantly slimmer frame in a short skirt and cowboy boots, she gave fans an even better look at her results as she modeled her tight leather pants. 

The 33-year-old paired her pants with a simple singlet top and matching stilettos, while she added some pizzazz with a textured velvet jacket, that had a fur collar!

PHOTO: Jessica Simpson steps out at LAX. (Splash News, splashnews.com)

Jessica looked super happy as she made her way through the terminal, followed closely behind by several assistants who carried her Louis Vuitton luggage. Can you blame her though? She certainly has a lot to be happy around right now.

With two beautiful children, a loving fiancé who she's preparing to wed this year, a red-hot career and an amazing post-baby body -- what more could a girl ask for? 

What do you think of Jessica's airplane attire? Do you get glammed up for an impending flight? Why or why not?

Follow me on Twitter @ChrisRogers86.