And baby makes four for Alessandra Ambrosio's growing family! The supermodel's fiancé made the big announcement on Twitter yesterday.OK! NEWS: ALESSANDRA AMBROSIO FLAUNTS HER BABY BUMP WHILE ON A HIKEJamie Mazur Tweeted, "Welcome my son, can't wait to show u around this crazy place." OK! NEWS: PREGNANT ALESSANDRA AMBROSIO REVEALS — "IT'S A ... Read More >>