Adriana Lima Bikini Pictures

Adriana Lima is 31 today! To mark her milestone, we've rounded up 31 of the supermodel's hottest pictures. She's been hitting the catwalk for Victoria's Secret for over a decade, but Adriana's current role is that of mom and wife — she and husband Marko Jaric are expecting their second child! Their special delivery will make 2-year-old Valentina a big sister.

Happy birthday to Adriana, and click through to see her sexiest photos!