David Walter Foster, OC, OBC (born November 1, 1949), is a Canadian musician, record producer, composer, songwriter, and arranger. He has been a producer for musicians including Chaka Khan, Alice Cooper, Christina Aguilera, Andrea Bocelli, Toni Braxton, Michael Bublé, Chicago, Natalie Cole, Celine Dion, Kenny G, Josh Groban, Brandy Norwood, Whitney Houston, Jennifer Lopez, Kenny Rogers, Seal, Rod Stewart, Jake Zyrus, Donna Summer, Olivia Newton-John, Madonna, Mary J.