Inexplicable

It's common in the US to sing Auld Land Syne at the stroke of midnight on New Year's Eve. I remember last year listening to a radio contest in which participants were challenged to say the lyrics to the popular tune; none of them could. Can you?

Anyway, the same is definately not true for Vietnam. Auld Land Syne is an English folk song, so naturally, it probably wouldn't catch on in Vietnam.

But another English New Year's song has: Abba's "Happy New Year" (Youtube version here). Clubs, bars, cafes, etc. play the song incessantly on New Year's Eve day and New Year's day. And I do mean incessantly-- more than one have I caught them stopping the CD after the song is over, and then replaying it.

Does anyone know why this obscure song is so amazingly popular here? Because I honestly have no explanation.