Happy Birthday, Jenny from the block turns 49 today. Lopez is known for wearing many hats, like singer, dancer and actress. In her biggest movie role, she portrayed Selena Quintanilla Perez in 1997's Selena. She hosted American Idol for five seasons and is now hosting NBC's World of Dance. She is currently dating former New York Yankees star, Alex Rodriguez. She's also a mom of two. Happy birthday, J. Lo!