You know your stuff breh are you a pianist?
Studied some music theory but even without that if you have a love of 70's/80/ music you will go " i know that chord progression from that old Slave/Stevie/Micheal/Minnie song" every now and again and a lot when it comes to Neptunes bridges.He still is a remarkable producer though.
he produced that "Liar liar" song that was huge last year or so..a straight Sting rip off,even to the vocal inflections.
On his Girl album,the last song(i think) has a long ass break at the end of the song with a guitar solo..listen to that then listen to Slave's first album and check out "Slide" and " Son of Slide"...That Girl album is some of the most blatant jacking(60''s backbeat and 80's pop and new wave) i have seen on a body of work in a minute and the album sounds and feels rushed.