Well you're where you should be all the time
And when you're not, you're with
someone who would spy on the wife of the postman
Wife of the postman, and

The story:

We were doing a music quiz when you have to sing the next line of a song. I knew exactly what song it was when I heard the intro but when I sang the next line everyone cracked up. Was convinced I was right until the DJ showed me the lyrics online.