Do a pop song and stack my Caucasians!

from Jason DeRulo (Ft. Nicki Minaj) – In My Head (remix) on Rap Genius

Meaning

Two possible meanings:

  1. Nicki, by getting on a pop song, is going to make tons of money, stacking bills with white presidents (Caucasians) on them.

  2. In the same way, a pop song will expand her audience to white people (Caucasians), stacking up her fanbase.

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