I'm always doing this and it gets even worse when I've had a drink.
Walked back from town last Christmas do (thought it was a good idea at the time), p*ssed as a fart, took me about an hour and half and sang to myself the whole way none stop "You are my City..." got louder and louder the closer I got to home. Was out in town after the game last weekend, wrecked again, must have got a taxi somewhere as a vaguely remember a taxi driver telling me off for having my head out of the window shouting "Oh Balotelli", got the 42 bus home this time though, and woke all my neighbours up singing same song, balls to them though, they should appreciate the Balotelli song and my note perfect voice at 2 in the morning!! ;-)