glyn,

I like the hook on this. It can be a great move to use a well known hook (from the movie, in this case). That way you start ahead of others, in terms of having the title known.

But, in stead of worring about rhyming, I would make it first priority to make the singer look good while performing the song. He won't, comin' off blaming a girl. A female singer might come across better blaming a guy, as that could be heard as female empowerment.. but blaming is usually a bad move in a song.

Wy's good suggestions takes off some of the strain on the singer, I think. "LAY THE BLAME RIGHT AT MY DOOR" is a great line IMO

But, I would edit out the blaming lines first, and then look at what you have left, and go from there.