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Humberto Gatica is a Chilean-born American recording engineer, mixing engineer and record producer, best known for his work with Celine Dion, Chicago, Michael Jackson, Barbra Streisand, Andrea Bocelli, Josh Groban, Cher and Michael Bublé. Gatica's international collaborations include producing artists singing in over six languages. Gatica's career is highlighted by humanitarian projects including We Are the World, We Are The World 25 for Haiti, Hands Across America and Voces Unidas Por Chile. Wikipedia