Alessandra Ambrosio Bikini Pictures

Alessandra Ambrosio is pregnant with her first son, and she showed off her growing baby bump recently in a bikini. The supermodel turned 31 on Monday, and her picture was a way of saying thanks. She wrote to her Facebook fans, "Thank you all for the wonderful birthday wishes! Have a great weekend everybody!" We marked her milestone as well — check out Alessandra's best bikini pictures from over the years. Alessandra's off on vacation during a break from work. Alessandra also showed another recent photo from the beach to announce that she and fiancé Jamie Mazur are expecting a boy. Their new addition will make daughter Anja Mazur a big sister for the first time.

Alessandra Ambrosio shared a new picture from the beach in Brazil! During a vacation in the city of Florianopolis, Alessandra Ambrosio was in a bikini showing off her growing baby bump alongside two friends. The supermodel is pregnant with her second child, and will make her 3-year-old daughter Anja a big sister in just a couple of months. Alessandra's trip is all wrapped up now, and she wrote that she's getting back to work in London. She's bound for a shoot, but apparently is not a part of the latest Victoria's Secret campaign since some of her fellow Angels were in Miami recently doing a new round of ads. Alessandra can be seen in a bikini, however, in Victoria's Secret's 2012 swim catalogue.

Alessandra Ambrosio and Lily Aldridge are both moms-to-be, but they had no trace of growing baby bumps in these new Victoria's Secret images. The girls, along with fellow Angels Candice Swanepoel, Jasmine Tookes, and Edita Vilkevièiûtë, were photographed for the new swim catalog by Greg Kadel on Bora Bora last year.

Lily and Alessandra are the latest Angels to announce their pregnancies. Last year, Miranda Kerr welcomed her son, Flynn, and the year before, Karolina Kurkova became a mom. This will be newlywed Lily's first child with Kings of Leon rocker husband Caleb Followill, while Alessandra and her fiancé, Jamie Mazur, are already parents to 3-year-old Anja. Both Lily and Alessandra were pregnant while walking in the November VS runway show. Alessandra was afraid people would find out she was expecting, explaining, "When I first found out I was pregnant I thought, 'Oh my gosh I don't think I'm going to be able to walk on the show,' and I didn't tell anybody . . . A week before, I told my booker, 'I don't think I'm going to be able to fit into the clothes because I gained a few pounds already,' but we were just quiet."

Alessandra Ambrosio and Adriana Lima teamed up with blond model Candice Swanepoel to launch Victoria's Secret's new SWIM line of bikinis today in LA. We had a peek at the girls in their two-pieces recently on the West Coast — Adriana sweetly posed in pastels for the retailer's upcoming catalog while Adriana struck a few poses herself. Adriana has been kept busy by the brand after a bra event in NYC last month with fellow Angel Lily Aldridge, who's currently putting the finishing touches on her May wedding to King of Leon Caleb Followill. There's a lot going on for Alessandra as well following her appearance on the April cover of GQ Brazil's inaugural issue.

Alessandra Ambrosio slipped into a bikini and combat gear for the cover of GQ Brazil's inaugural edition. The model hails from the South American country, and she looked right at home posing for photographer Gavin Bond in the racy spread. She wore a handful of sexy two-pieces for the magazine, and the Victoria's Secret Angel also recently donned a little black suit for one of the retailer's promotional videos. Alessandra works hard to keep her body in shape with pilates and regular trips to the gym, and she exercises enough to keep her amazing figure while still eating her favorite foods.