Topping the charts... the Norwegian charts

Yesterday's GUARDIAN newspaper listed the year's best singles (you can find the list here).
Topping the list was "KIDS" by Brooklyn duo MGMT.
The newspaper described it as:
"A jubilant mix of New Order, Prince and Beach Boys that expressed the pure joy of childhood and the melancholy of growing up via a psychedelic kaleidoscope."
So, why on Earth did this great song only manage to reach No. 116 on the U.S. charts? I didn't even know the charts went down that far!
"Kids" managed a not-much-more-respectable No. 92 in Canada, while rising to No. 25 in Britain. The song topped the charts in Norway, of all places.
Check out the video here, to see what all the Norwegian hub-bub is about.