Supermodel Alessandra Ambrosio is nude in a new ad campaign for Brazilian jewelry company Vivara, even though she is eight months pregnant. Amazingly, Ambrosio has worked during most of her pregnancy.

Alessandra, who has a two-year-old daughter Anja, is due to deliver a boy next month.

The superfit 5’10” Brazilian bombshell shared the photo on her Facebook page, writing: “A nude photoshoot was good, because pregnancy makes me much more confident. I’m proud of my body to be generating a life…”

Check out Alessandra’s photos; click to enlarge.

Ambrosio, 31, continued: “I wasn’t ashamed to do a nude shoot for two of my favourite photographers [Mert Alas and Marcus Piggott]. I’m happy to have one of the most important moments of my life recorded by them.”

Like fellow Victoria’s Secret supermodel Adriana Lima, who’s also pregnant with her second child, Alessandra looks just as gorgeous in her third trimester as she is when not pregnant. She has not put on a lot of weight.

In fact, Ambrosio was almost three months pregnant when she walked the runway in skimpy lingerie at the 2011 Victoria’s Secret Fashion Show last November in New York City.

Ambrosio, who regained her 34-25-34 figure in record time after her first baby, wants to bounce back into shape by July, when she’ll attend the launch of the Victoria’s Secret store in London.

“I already have jobs planned for afterwards so hopefully will be back in shape,” she said. “I told my booker and my manager; “I know I have a job to do, so just book the jobs and hopefully it’ll be fine.”

Alessandra previously said she maintains her sizzling bikini body by eating small portions and doing ballet, squats, lunges and capoeira.