It was a super-duper international hit, of course. At the end of the Inca Trail, the night before the climb to Machu Pichu, there is a camp at Winay Wayna. Where a mixed bunch of very ragged looking tourists spend a night feeling very thrilled that they managed to "trek" 3 days to get there (in reality, a number of extremely frugally equipped Quechua porters carry all your stuff, cook, and in general fuss over you). So there we were, mightily pleased with ourselves, knocking down the pisco sours or whatever, and suddenly someone plays this song and like a bunch of pre-programmed idiots we all stood up and danced the Ketchup dance...
But even so we were obsessed, the roomie went and bought a CD simply because it had 3 video versions of this. Not sure what it was about this one, maybe the promise of exotic tongues, sunny climes, warm bodies... A goodish chunk of the aforementioned goodish chunk was spent, of course, in trying to decide which sister was the "best".
Oh, those days :P