Jessica Simpson arrives back at her NYC hotel after having dinner with mom Tina and some pals.Splash News

The national obsession with the weight of Jessica Simpson rages on now that she’s skinny again — some say “shockingly” so.

On Tuesday she was spotted with her mom, Tina, and pals at the Viceroy Hotel’s Kingside, where she didn’t eat much.

Simpson was “wearing short shorts, tall wedges and looking very good, in healthy shape,” said one spy.

But “she was just sipping on a cocktail and picking at the food.”

Luckily, low blood sugar didn’t kick in: “She was very polite to all the servers,” our spy added.