It's '87 state of mind that I'm in (mind that I'm in)
In my prime, so for that time, I'm Rakim (I'm Rakim)

from Jay Z – Blue Magic Lyrics on Rap Genius

Meaning

1987 is the year that Rakim & Eric B. released their classic album Paid in Full. Like Rakim during that period, Jay is at his prime

This song is also littered with references to “My Melody”, one of Rakim’s most famous songs.

Coincidence? I think not

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