GENERAL KNOWLEDGE: Childrens songs, the grand old duke of york, had how many men?

Questions

Colour of the Meanies in the Beatles cartoon _Yellow Submarine_?

Elvis looked forward to the time his moon would stop being this colour.?

MTV ran a contest for a video to be produced for this Madonna song.?

Nino Temp sang, and April Stevens talked on this 1964 hit.?

The Checkmates, Ltd. sang about this colour of pearl.?