Revivals/awakenings find their beginnings in unknowns, the obscure, despised of the world. Not in highly popular celebrities.
Where in the Bible does it say that? Perhaps he was thinking of this:
Brothers, consider the time of your calling: Not many of you were wise by human standards; not many were powerful; not many were of noble birth. But God chose the foolish things of the world to shame the wise; God chose the weak things of the world to shame the strong. He chose the lowly and despised things of the world, and the things that are not, to nullify the things that are, so that no one may boast in His presence. It is because of Him that you are in Christ Jesus, who has become for us wisdom from God: our righteousness, holiness, and redemption. Therefore, as it is written: “Let him who boasts boast in the Lord.” (I Corinthians 1:26-31)
Of course it says "not many", so that must mean there still may be some? God bless Kanye if this conversion of his is genuine and that though his zeal, souls are brought to Christ. There is a LOT of pressure on "famous" people who make public professions of Christian faith to compromise them through the things of this world. Our adversary the devil, as a roaring lion, walks about, seeking whom he may devour so we should remain sober and vigilant. We are commanded:
Do not love the world or anything in the world. If anyone loves the world, the love of the Father is not in him. For all that is in the world—the desires of the flesh, the desires of the eyes, and the pride of life—is not from the Father but from the world. (I John 2:15,16)
Kanye may well have to let go of the fame and wealth that ties him to the world system and which can cause him to compromise his faith. We should pray for him. His life may become very difficult.