The 41-year-old singer-and-actress was inspired to launch her own charitable organisation The Maribel Foundation - which is named after her husband Marc Anthony`s sister, who died from a brain tumour - after givingbirth to twins Max and Emme, now three.
She said: "What`s the most empowering thing I`ve ever done? God. Probably givingbirth. And as a direct result of that, setting up a charity with my sister Lynda.
"It was a dream we had for a long time. Once we had babies we were ready to say, `Let`s do it`. We`re not claiming to change the world in one day, we`re just going to do our little part.
"We always said we`d help women and children`s health and education and now it`s happening."
Jennifer also believes that the more women are happy with themselves, the more likely they are to take in interest in their appearance.
She said: "A part of how you take care of yourself on the outside reflects how you feel within.
"If you become empowered on the inside, it will get reflected on the outside. I don`t believe for one second that`s a superficial thing, it is important."