It's only Tuesday and we're already in the middle of an all-star week for swimsuit birthdays. On Monday, Tori Praver celebrated her 27th and on Thursday Yasmin Brunet will turn the big 2-5. This comes on the heels of Heidi Klum's 40th last Saturday. But today is the big one - Bar Refaeli turns 28. The Israeli-born model has appeared in five swimsuit issues and earned a reputation as one of the world’s top models. She got her start when she was eight-months old and has been in front of the camera ever since. In honor of Bar and her big day, we present this gallery of her best swimsuit pics.