Victoria's Secret model Alessandra Ambrosio rocks a skimpy patterned bikini -- and her second-time mama baby bump -- on her 31st birthday. Ambrosio confirmed her expecting status to US Weekly in September. "Family is the most important thing for me and I'm thrilled to be adding to the family," she told the magazine. "I'm fortunate to have a loving and supportive family. It's a blessing that it will soon be growing."