Mine is So Cruel by U2.
I hear it and am instantly brought back to November 2002 and sitting in my cubicle and listening to my crappy little boom box on my cubicle shelf.
I remember that I just earned my degree the previous summer and really, really loved my job and the holidays were coming on. I was happy.
iTunes just played it, and I had to listen to it all. Damn, I miss those days.
What have you got?
I had ear surgery a few years back. I had a bad reaction to the anesthetic and wound up unexpectedly spending the night in the hospital.
My awareness of my surroundings was shaky, my sense of time was nonexistent, I felt horribly nauseous, my joints all hurt, and the song “Cold and Broken Alleluia,” which my wife had been playing and singing around the house in the previous few days, WOULD NOT STOP floating through my head.
I’m sure the song is a good one, but every time I hear it I flash back to that miserable, miserable experience.
Pink Floyd:
Crazy,
Toys in the attic, I am crazy,
Truly gone fishing.
They must have taken my marbles away.
Crazy, toys in the attic he is crazy.
Absolutely anything by Kesha.
I’m also a huge U2 fan here. I love anything by them actually. I also love anything '80’s such as Under Pressure, Bizarre Love Triangle.
That was one of the songs on The Wall that I always skipped over, except that one time when I didn’t and now have to listen to if it comes on my iPod. :smack:
That Cher PoS: “Do you Believe in Love?”
Oh, crap–now I will be “hearing it” all night.
I always have some song playing in my head. Right now, it’s “Woman By My Side” by Peter Ram.
Right now it’s “What’s New, Pussycat?” by Tom Jones.
Whenever I’m in the car and hear the cool intro to Aerosmith’s “Sweet Emotion”, the stereo has to go up to 11 and my driver’s seat becomes Power Chord Central.
This song, spoilered because it’s probably not safe for work. And very ear-wormy.
Haha! I forgot about that one. And yes, it is indeed very earwormy. And awesome. 
Anything by Jim Croce but particularly “I Got a Name”. This song hits me on a very deep emotional level. I can’t even explain how it affects me but if you’ve felt it, you’ll understand what I mean. I’ve heard people say the same about artwork, poetry, the sound of their new baby crying - I’ve never felt it for anything but that song.