memes

I mean, it's probably just up to whoever first started doing it. They chose that song, so it's that song. Other songs may have also worked.

But there is one thing that I think gave Rick Astley an advantage over specific other groups like A-ha. And that's his name. If you look up the history of Rickrolling on Wikipedia, it says it replaced a meme called "duckrolling", which was used the same way as Rickrolling, but it was just a picture of a duck with wheels. So the advantage is that "Rick" is his name and it's an easy drop-in replacement for the word "duck".

There's other artists who have names that would work. Who knows? In another universe, they might have "Beckrolling" or something.

Edit: I was just reading farther into the Wikipedia article, and the guy who made the first Rickroll said he chose it because it came out in his birth year of 1987.