Here's the curious thing: The participants were also surveyed about the songs, and the reviews they gave them were significantly different from what their brain scans revealed. Yes, although the songs gave their brains the kind of high you usually have to break a bunch of laws to achieve, they consciously went against their brainwaves in order to seem less inclined to pop music than the MRI scanner showed they were.
And not only does your brain go apeshit when it hears catchy, poppy music, but also it actually derives pleasure from predicting the melodies as you listen, anticipating the emotion associated with certain types of music. This leads to a one-two punch where you get one thrill when your brain is expecting something to happen, and when it actually does another rush of dopamine comes in from an entirely different part of the brain. And this is where your brain enters Addict Mode. The easiest way for it to get its dopamine fix is tunes that are simple, predictable and repetitive -- so that's what it prefers, no matter your views on the artistic merits. That's right -- no matter how carefully hipster you are, or how hardcore a metalhead image you maintain, your brain is secretly into Bieber.