Looking HOT! HOT! HOT! Jessica Simpson showed up on Broadway last night to watch little sis Ashlee make her debut in the musical Chicago.

And, let’s be honest, she stole the show in her figure-hugging silver, mini-dress.

Newly single Jess didn’t look like she was having any problems getting over former beau Tony Romo.

Instead, she was all smiles as she waved to fans and photographers before taking her seat to watch Ashlee in action.

More pictures of Jessica in the gallery below…