Jennifer Lopez and husband Marc Anthony's twins Max and Emme are 3-year-olds already used to living the jet-set life. "They just love people, and they love music, and they love laughing and running around," Jennifer Lopez told Entertainment Tonight about her children (pictured making their modeling debut with Mama in an ad for Gucci). "They're very well adjusted to this life; they know nothing else. … It's like traveling, dancing, singing, sets -- that's their life. They kind of get, like, this is what we do."