'Cause I'm in too deep
And I'm trying to keep
A bun in my head
Instead of going under

The story:

I was in the car with my sister and this song came on the radio. Now, I'm the one who usually knows the correct lyrics and make fun of my sister when she sings the wrong words. Anyway, this song comes on, and as usual I'm singing at the top of my lungs. When I sing the part about the bun, my sister just broke out laughing. I guess I knew that was wrong, but what else could it have been? I guess I know now...