Washington, Oct 3: Actress-singer Jennifer Lopez has claimed that her marriage to Marc Anthony is a success because they share a natural passion.

The Hispanic star, who has been married to Anthony for the past three years, said that chemistry is what keeps the romance alive in their union.

"Chemistry is everything - I really do believe that. It's the intangible, something that you understand about the person, and they understand about you. It's mutual,” Contactmusic quoted Lopez, as saying.

Lopez added that it is difficult to explain chemistry.

"You can't explain it, when you get close to someone, you either have chemistry...or you don't,’ she added. (ANI)