Which one is it? On the UK iTunes it calls him P Diddy but on the US iTunes it calls him Diddy. So random

That's because he's not allowed to use "Diddy" in the UK. Another well known artist goes by that name.

Hey, can you buy songs from the UK iTunes if you have a US account? They have most of the good stuff I want.

Who?
I don't think you can buy stuff from the UK iTunes, i've tried buying stuff from the US but it doesn't work.

I just call him ditty
or puffy diddy

Who knows these days. Next it might be "D"

I don't believe so, which is killing me because I really want to buy "Something About You" by Jamelia but it's not available in the U.S.

*Small joke*

I once called him "Diddy P" which sounded near to "Did-he-pee?"