Does this ring a bell for anyone

[james_davis_nicoll]

From my message box:

Sometime, I think in the last couple weeks but it could
possibly have been any time in the last year or so, there was a comment posted to one of your blog entries that was a highly-choreographed dance video, with a distinct Swedish or Finnish or the like style, halls of mirrors, main dancer was a guy in a sort of Doctor-Who-looking outfit, it started with a nerdy teacher in a classroom with the students all swaying along to the beat and morphed into the main dance number, lots of long-leggy girls, with a really long name like "Pepihulucalistroni" or some such that I _cannot_ recall exactly. At the end the dancers all walk off in various directions, leaving just the guy-in-floppy-hat and one blonde sitting on the dais in the midst of all the mirrors. (And it's not Carmelldansen, I know that.)