i was wonderin that to. i can hear him talking a little bit in the beginning whe he says something like ''it's all about you but you never lyin haha'', but i don't hear him rapping.
I think all he does is sing in the hook whenever it says "...its all about you". In the begining of the song he says something like, ..."Im gonna say its all about you..." Thats all I could put together.