I saw it, and it was the #1 thing I didn't like about the movie.
Every time they were at a jazz club or one of Gatsby's extravagant parties where there was clearly a jazz band playing, they would blare some dub step-ish Jay-Z song and it took me right out of it.
Weirdest example was when they were driving over the bridge and the Model T next to them is a car full of black people popping bottles of Monet while "H to the Izzo" blares.
WTF?