J.Lo at 40: How a Diva Was Made!

In 40 photos, see how the birthday girl (on July 24) went from Jenny from the Block to superstar

TRUE STORY

Although fans initially decry the casting of a Puerto Rican actress as slain Mexican singer Selena in the 1997 biopic, Selena's father, Abraham Quintanilla, supports Lopez's portrayal of his daughter. Comedian Paul Rodriguez, a Quintanilla family friend, tells PEOPLE, "Looking at Jennifer, you could swear that the killing was all just a bad nightmare."