It would be hilarious. Naruto would probably do it with his trademark enthusiasm, adding his own unique spins to the dance moves. Sasuke might be more reluctant at first but could be dragged into it by Naruto's infectious energy. Sakura would likely be both amused and a bit embarrassed, but still join in to show her support for her friends.
In a Naruto fanfiction, Gangnam Style could be part of a cultural exchange event in the Hidden Leaf Village. A traveler from a far - off land where Gangnam Style is popular arrives and starts teaching the villagers the dance. Naruto, being the curious and energetic character he is, picks it up quickly and then encourages others to join in, which could lead to some really fun and comical scenes.
One tip is to build a good vocabulary in both Visayan and English. This helps you find the most accurate equivalents. Another is to study the cultural nuances of Visayan. For example, certain traditions or beliefs in Visayan might need special handling in translation. Also, don't be too literal. For instance, if there's a Visayan expression that's very metaphorical, find an English metaphor that conveys a similar meaning.