Multiple business owner James took part in the BBC One show in 2014, and while competing on the programme, James compared himself to a younger version of Lord Sugar.
James starred alongside Mark Wright, Bianca Miller and Solomon Akhtar, but found himself eliminated in week eight when Lord Sugar told him, "You're fired."
Having now won the latest series of CBB, James has said it's all down to his time on The Apprentice.
James tweeted: "Just want to say thanks to @Lord_Sugar for making it all possible! I learnt a lot about myself from the @bbcapprentice very grateful!"
James was crowned the winner of CBB's 16th series on Thursday night, beating off competition from Austin Armacost (second place) and Natasha Hamilton (third place).
During his exit interview, he told host Emma Willis: "I can't believe it. To walk up those stairs alone, there have been so many big personalities, big stars... I've tried to be myself, put other people's feelings ahead of my own. I didn't have a strategy. I went with my heart and my gut."
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