Next to the party wall after the neighbours woke me up at 1.25am with their music?
It turns out even music you like is annoying in that situation.
In general our neighbours are very good so I decided to leave it for an hour before going round and telling asking them to turn it the fuck down, and they stopped after about 55 mins. Still was an hour of sleep missed though.
It would childish to wake them.from their hungover stupor with teletubbies and friends wouldn't it?