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Christopher Adam Bumstead (born 2 February 1995) is a Canadian IFBB professional bodybuilder. Bumstead is the reigning Mr. Olympia Classic Physique winner, having won the competition in 2019, 2020 and 2021. He was also the runner-up in 2017 and 2018. He is often referred to by his nickname CBum. Bumstead maintains a large online presence with content focusing on his lifestyle and bodybuilding.