I am not a fan, and would not recognize his music, but I understand it is typical, with foul language and themes. I tend to believe his conversion. A celebrity would not risk alienating the majority of his fan base by expressing a sincere love for the Lord. In the past it seemed from news reports that West fancied himself a bit of a diety, so I hope his salvation is real.
We should do more than hope we should lift him in our prayers. If sincere and it appears he is, he has a long and difficult road ahead