Cause I'm in too deep and I'm trying to keep
A football in my head instead of going under

The story:

Listening to my CD at work, a friend of mine was singing along & when this track came on said "Oh great, it's the football song".
We all stared at her blankly until she sang along with "her lyrics", at which point we all howled with laughter.
Only problem is, now everytime we hear the song, we sing her version!