Psy released his "Gangnam Style" music video a year ago and since then it has become the most famous video of all time. But can you remember what was going through your head the first time you saw it?

The Fine brothers have risen to YouTube fame over the past couple years for their web series, "Kids React" and its follow-up, "Teens React." In it, they show a popular or controversial YouTube video to a group of youngsters, film their reactions, and then ask a series of follow-up questions.

Last year, the Fine Brothers showed a diverse bunch of teens Psy's now world-famous "Gangnam Style" video which, at the time, had only clocked a mere 30 million YouTube views. A year later, and over a billion more online hits, it is fun to look back at what these kids initially thought.

Even before the "Gangnam Style" phenomenon started, these teenagers had some surprising insights into the future star, Psy.

Almost instantly, they made references to Justin Bieber, other famous dance crazes, and Psy's 'pop star image'- breaking appearance. They talk about the catchiness of the song and the rising popularity of K-Pop as fueled by online media sites like YouTube. They even go as far as to say that the language barrier does not matter as long as it is entertaining.

Watch the video and bonus footage below and tell us how you first reacted when you saw "Gangnam Style"!