to Jennifer Lopez
, who marked her milestone 40th yesterday.
The mom-of-two showed off her famous curves in a figure-hugging silver dress as she joined her husband Marc Anthony and friends
for a birthday bash at the Hotel Griffou in New York's Greenwich Village. It was a far cry from the fake baby bump she's been sporting all week on the set of her new film, The Backup Plan
Earlier that day Jennifer, who is mom to