He listens to The Neptunes, she Mr. Kells

from Lupe Fiasco – Make Sure Lyrics on Rap Genius

Meaning

This begins to show the surface contrasts between the two characters with something as basic as artistic interests: Lu listens to the production duo of Chad Hugo and Pharrell Williams (The Neptunes) and Chenelle a “Mr. Kells.” Kells could be a reference to the Book of Kells, (http://en.wikipedia.org/wiki/Book_of_Kells) as suggested by the lines immediately following this one.

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