C#

Apparently, the White Stripes ended their Canada tour on George Street in St John's by playing a concert consisting of just one note, after which they claimed to have officially played in every province and territory in Canada. The note in question was "reportedly a C-sharp". Which begs the question: if you were only gonna play a single note, why would you choose a C-sharp? Why not play a D-flat? Of course, it could be that the person who reported hearing them play a C-sharp couldn't tell the difference between a C-sharp and a D-flat (which is understandable......).

See, 'cos if were only gonna play one note, I'd play a G double-flat.