Get one of those cute little skeletons from the dollar store, attach a tag with the following poem:

You say you're on a diet
And you must watch everything you eat
You need to lose a little weight
And you're determined you won't be beat
But be careful as you do it
Don't go too far or you will see

You won't just lose a few pounds
You'll end up looking like me
2004 Yvonne Lowther