The one that gets me heading down memory lane is Always by Bon Jovi. It was the 'pash' song at high school and always the very last song played at the school disco's, hence the name LOL.

Other ones trigger bad moments for me, like Shania Twains 'I'm outta here' - came on in the middle of a casual 'episode' shall I say and it always sticks in my mind LOL - if it didn't have the line "if you're not in it for love ..... I'm outta here" in it I think I'd like it better