A song that reminds you of a certain event.
The hardest part of this was thinking of an event, oddly. My first instinct was last Hogmanay and the song would be Justboy by Biffy Clyro, but it's already been done over on friendface. I also considered Yes by McAlmont and Butler, which reminds me of APRIL THE EIGHTEENTH - a night out that has gone down in history amongst my friends for being one of the funnest things ever to happen to us.
But I think I will choose the Orbital version of the Doctor Who theme, which reminds me of the first time the alternative music society at uni DJ'd the main venue in the students's union, and got a crapload of people dancing to it. Which was awesome.