Though I cannot post the lyrics you refer to, I will add a verse to those, whatever they are:
^^

Though I've used seven of my lives,
My feline bones are ag-ed,
The little kitten in me thrives
It simply won't be cag-ed, So I'll still pounce with zest and glee
On mousies when they're stirring
The world was made for cats like me--
How can I keep from purring?!

New verse by Sonja W. Oates 2001; tune : How Can I Keep From Purring