In any country, what's the shortest number one chart hit? (Either duration of the 'A-side' / main track, or total duration)
In the US, the shortest number 1 on the Billboard Hot 100 chart is "Stay" by Maurice Williams and the Zodiacs. It spent only one week at number 1, on November 21, 1960. I've seen various reports on the length of this song ranging from 1:37 to 1:50.