What are some songs that you know which song it is as soon as you hear the intro for 1 second?

This would have to be my particular favorite ballad, "Southern Girl". At the time I heard it for the first time, I thought it was very catchy, and then I remember probably singling it out hundreds of times. Pretty much listened to the song whenever I could. Listened to it so much that I memorized every lyric and knew all the melodies of the song, so as soon as I heard the intro for 1 second, I definitely knew it was "Southern Girl".