The 43-year-old, who has twins Max and Emme from her former marriage to Marc Anthony, said although she has a successful career, none of it is important without her kids, reported Contactmusic.
"It's just the one thing you don't want to mess up. You can mess up in all other areas and get back up, but you don't want to mess up there. They're so precious to you, and they make everything better in my life. They make me feel better every single day. It's the most important thing," she said.
Lopez, who is currently dating back-up dancer Casper Smart, 25, also said that praise from her kids means more to her than from anyone else in the world.