Alessandra Ambrosio gives birth to a son LOS ANGELES, May 8 (UPI) -- Brazilian supermodel Alessandra Ambrosio has given birth to a son, her fiance, California businessman Jamie Mazur, announced via Twitter. "Welcome my son, can't wait to show you around this crazy place," Mazur tweeted Monday. No other details about the child -- such as his name, weight and birthplace -- were immediately reported. The couple are already parents to daughter Anja, 3. UsMagazine.com said the Victoria's Secret model enjoyed a baby shower with friends and family Saturday, just two days before the boy's birth.