The duel of the century is upon us: It's "Barbie" vs. "Oppenheimer" at the box office on July 21. Who will come out victorious?! While we're certainly not rooting one way or the other (fully embracing the "Why not both?" mentality when it comes to watch party plans), every one of us has a little "Barbie" or a little "Oppenheimer" within us – and it simply can't be both, in this case. Take our very scientific quiz to find out if you vibe better with beach parties or nuclear physicists.