Last night, Jennifer Lopez went to an early birthday dinner with Casper Smart wearing slick black leather pants. Today, on her real birthday, the singer switched things up in a more ethereal A.L.C. nude and white pleated maxi dress ($898). A white Chanel bag, Jimmy Choo espadrilles, signature oversized hoop earrings, and rimless square sunglasses added further glamour to Jennifer's daytime chic. Score the singer's exclusive colorblock maxi dress now to frolic in during the day, then later, throw on a black leather jacket and high-heeled sandals for a nighttime version.