Is JESSICA SIMPSON finally dropping those post-baby pounds or has someone just tightened her corset?!

Jessica and finace Eric Johnson down at LAX airport Tuesday, after a whirlwind few days in New York where the somewhat-talented diva unveiled her new pay-for-play Weight Watchers campaign with some much needed ballyhoopps on Good Morning America and Katie.

IN EL Lay, the de-boarding deb wore a black floral dress, while retired NFL tight end Eric, 33, kept things low-key in a black Brooklyn Dodgers cap and a plaid shirt, style watchers at said.

The busty 32-year-old Texas beauty this week, just four months after having her baby girl Maxwell Drew, showed off her post-baby bod after seemingly dropping 40 pounds.

 She says she's still 10 pounds removed from her goal weight.

“I’m on my way and it feels amazing,” she enthuses in new Weight Watcher commercial.

We’ll see . . .