Per the press release,
Christina Aguilera uses her voice for good in the fight against hunger by filming a new PSA for Yum! Brands World Hunger Relief in Los Angeles. The effort launches this fall in KFC, Pizza Hut and Taco Bell restaurants worldwide to benefit the UN World Food Programme and others. Nearly 1 billion people are going hungry around the globe and Aguilera is raising awareness as global spokesperson for Yum! Brands World Hunger Relief.