When authors give shout outs to other great works, people, and events, it's usually not accidental. Put on your super-sleuth hat and figure out why.
Even though Tris gets to leave the confining fenced-in isolation of post-apocalyptic Chicago, we still don't get any allusions to anything. She does get to see some billboards advertising makeup and soda and the like, although this is more of a commentary on advertising culture than any sort of pop culture reference.