First, if anyone of you guys are absolutely sure that I'm wrong then please don't hesitate to correct me, I'm not stubborn! 
I've also questioned this, like how did they record back then?
I mean now days we plug the guitar in the preamp and straight into the mixer (?!)
And if they used the same recording technique back then, we wouldn't hear it on the record since the sound from the guitar goes straight into the preamp without recording what's going on in the room?!
(Hehe this gets me thinking of the "Eddie Murphy - Party all the time" video where they're all gathered in the "booth")
This isn't true, at least not
all of them.
(U Don't Have To Call was indeed produced for MJ though)
I have around 15 hours of non-commercially released footage of the "Justified" sessions that can kill some of these myths.
What's A Guy To Do was a track Justin, Chad & Pharrell made together for Justified.
But what's really fucking up my mind is that 5.15 into the video Chad is playing the melody to
"Let's take a ride". I don't know if this was meant to be a part of "What's a guy to do" or not though.
This track later on went to Usher, you can grab it here.
http://tinyurl.com/pz9zff
BTW, here's the BMI info:
http://repertoire.bmi.com/title.asp...24674&ShowNbr=0&ShowSeqNbr=0&querytype=WorkID
(Shouldn't Usher's name also be there, even if he just sang on it?)
Take It From Here
Again, this is a track Justin and Pharrell wrote together.
I am not sure the instrumental was done before Justin's arrival to the "Justified" sessions though.
Rock Your Body
Once again, there were no lyrics written to this song,
but I have no knowledge if the instrumental was previously made for Michael.
Last Night
Here they are in the studio working on it. The beat is hardly even in a demo condition to send to Michael so I
guess Pharrell & Chad came up with it during the Justified sessions:
Nothin' Else
Unfortunately I don't remember much about this one. However I remember a segment where Pharrell and Justin is working on the song and Pharrell I starting to remember the bridge and they get stunned how Pharrell almost forgot that one. However I can't remember if Pharrell said it was something he wrote the other day or a long time ago before the session. I kind of need to look back.
Like I Love You was as good as complete on Justin's arrival in the first studio session - Pharrell sang on the demo version BTW.
What's interesting about this track is that Justin says something like "Don't tell me this isn't the 'Don't stop 'til you get enough 2000'" in one of their sessions.
Why does he say this? Because it was meant for Michael? Or maybe just because it's heavily inspired by DSTYGE with the same rhythm on the guitar in the intro as the low pitched electric piano(?!) in the intro of DSTYGE? And a trained hear can hear a connection with the tom pattern from DSTYGE and the sub bass pattern that hits the same time as the kick in LILY. You can search for connections forever.
I know nothing at all about the history of the other tracks you mentioned though
I think "U Don't Have To" would be a real good look for Michael. Man I get chills by only thinking about Michael singing that beautiful bridge:
"Gonna boogie tonight, 'cause I'm honestly too young of a guy, to stay home waiting for love.
So tonight I'm gonna do what every single man does, and that's party."
If I understood Rodney correctly, there are 7 tracks the world hasn't heard - however, it wouldn't surprise me if he forgot about "We've had Enough".
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I hope someone had enough passion to read this whole post, and hopefully at least 1 person or so found it interesting
