When the 3 girls drive up to Val, Mel and Josie at the bowling alley after the Pussycats gig, one of them puts a Coke can on the top of the car and you can clearly see there's no picture on it. In the next shot, you can see a picture of one of the guys from DuJour on it.
At the beginning, when Wyatt is "removing" Dujour, he says to the pilot, "Take the Chevy to the levee." I'm fairly certain this is a reference to Don McLean's song "American Pie," written for the death of Buddy Holly, a famous 1950 rock-and-roll singer. One of the lines in the song is, "...took my Chevy to the levee but the levee was dry."