| http://www.w3.org/ns/prov#value | - The company said its World Hunger Relief effort has raised nearly $150 million for the United Nations World Food Programme and other organizations since its launch in 2007.Aguilera's PSA, which debuts Thursday, features her song Light up the Sky.She will return for the fifth season of NBC's The Voice on Sept. 23.___Online:http://www.christinaaguilera.com/ushttp://www.fromhungertohope
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