Carolynn:

Here's one from way back in the 60's; Sung to The Jets' Song.

When you use Crest
You are fighting decay
From your first baby tooth
To that last gold inlay

When you use Crest
In your home dental plan
All your teeth stay in shape
Cause it's got flurostan

It passed ev'ry test
In Maine and Indiana
It outcleaned the rest
In Georgia and Montana
IT BEAT IPANA!

We all tried Crest
While the others did not
Now we've got 20% less
Tooth decay than they've got

When you use Crest, you use the Beeeeeeeest!