Not even a full month since she gave birth, Fergie was spotted out-and-about for the first time since she became a new mom to baby Axl in August.

The Black Eyed Peas singer flaunted her post baby body during a romantic dinner date with husband Josh Duhamel at Hakkasan in Beverly Hills on Wednesday. The 38-year-old looked gorgeous and much slimmer after giving birth as she was dressed in skinny black jeans, an oversized T-shirt that and a blazer which she paired with white heels and a black clutch bag.

There wasn't a hint of a baby bump as her loose shirt fringed over her stomach.

Duhamel looked handsome in jeans, a green T-shirt and a leather jacket as he led his wife out of the restaurant.

See photos here:

The 40-year-old actor and his wife welcomed their baby boy weighing in at 7 lbs., 10 oz. on August 26. The new parents have kept the baby out of the spotlight for only two weeks before releasing pictures of him on their Instagram pages last week.

"Hello world! #daddyandmommymademedothis #whatsahashtag," Fergie captioned the picture.

Duhamel and Fergie wed back in 2009. In 2012, he opened up to Oprah Winfrey how he has made his mariage last.

"We grew up in very similar ways," he said. "My mother was a teacher. Both of her parents were teachers. We've both had to work for what we got. We're both Catholic. There were a lot of things that were really compatible between us."