Kendrick Lamar changes his voice in post production. He's obviously a influenced rapper from Andre 3000. Nicki Manaj has a bipolar disorder, the bytch changes her voice because she can't fukking help it, and now DJ Khaled wannna marry that crazy bytch. nikka, do you wanna live?
K. Dot's voice is nothing but editing to add to the creationism of his songs.
Like on Sing About Me, when Keisha's sister is giving us her input she says she'll never fade away, but as she continues rapping, the vocal slowly fades. Thats clever music for you.