Jennifer Lopez, Birthday
Credit: AKM-GSI; Courtesy Photo; Pascal Le Segretain/Getty; Seth Poppel/Yearbook Library; Bryan Steffy/WireImage

Jennifer Lopez turns 43 today, and to celebrate, we rounded up a few good reasons to show the birthday girl some love. Click through the gallery to get the inside scoop on her relationship with her new man, Casper Smart (hint: "She's the boss"), her beach style, her most memorable beauty looks, and more!