Taking a night off of mommy duty, Jennifer Lopez was spotted living it up at the premiere of "The Curious Case of Benjamin Button" last night (December 8).

The "Waiting for Tonight" songstress was in top form as she sauntered down the red carpet, sporting an elegant ivory cleavage baring gown as she posed for the paparazzi.

And it sounds like Lopez's recent family expansion has her already thinking of finding a new place to call home - she and husband Marc Anthony recently put their Bel-Air home on the market.

Listed at $8.5 million, the 7,357-square-foot French farmhouse-style estate boasts four bedrooms and 5 ½ bathrooms, and sits on .75 acres surrounded by a gated wall.

Enjoy the pictures of Jennifer Lopez at the premiere of "The Curious Case of Benjamin Button" (December 8).