Multi-Grammy Award winner and international superstar Christina Aguilera uses her powerful voice in the fight against hunger in a PSA for Yum! Brands World Hunger Relief effort kicking off in over 40,000 KFC, Pizza Hut and Taco Bell restaurants worldwide.br br Nearly 850 million people are going hungry around the globe and Aguilera is raising awareness as global spokesperson for Yum! Brands World Hunger Relief effort.br br The new PSA includes footage from Aguilera’s recent field visit to Rwanda where she witnessed the effects of hunger first hand and helped beneficiaries of WFP’s nutrition programs. Aguilera served food to hungry children who walk miles to and from school each day to receive a hot meal through WFP’s school meals program. She also traveled to a refugee camp that houses more than 18,000 people living in small man-made huts. She spent time with mothers and children at the camp and heard about how they escaped violence in the Democratic Republic of Congo. Aguilera’s inspirational song, “Light Up the Sky,” plays throughout the :15 and :30 versions of the PSA that will air on television and online this fall.br br In addition to the new public service announcement, Aguilera raises awareness for the issue through new World Hunger Relief posters at KFC, Pizza Hut and Taco Bell restaurants with the quote “Together, we have the power to save lives and move from hunger to hope,” plus advertising and online efforts.