The Voice coach recently visited the poverty-stricken people of Kigali, Rwanda for an emotional mission to fight world hunger with the UN World Food Programme.
"This trip came at a time when I really needed to step away and connect with bigger issues in the world, [and] this trip really touched me in a way I never felt before," Aguilera, who works as an Ambassador Against Hunger, told People.
"I came home and really wondered about why some people are born to some situations and others are born in a different place," she continued. "I had to come to terms with a little guilt even for coming home and not doing more. The people of Rwanda touched me in a way I cannot express or put into words. They are in a place that needs our help and I am so proud of the work that we are doing there."
Aguilera, who's a mother to 5-year-old son Max, added, "After the birth of my son, I started looking into causes that touched me as a mother and I was so moved by the work the World Food Programme and [Yum! Brands World Hunger Relief] did."
Aguilera says she'd definitely going to return to Africa for another visit in the future.
"As a mom, to know that there are kids that go to bed hungry is just not acceptable," she said. "Food is a human right in my mind and knowing that I can help means so much. In Rwanda, we visited a school. The kids walk approximately two miles to get there, not only to learn but for many this is their only meal of the day."