This photo of Fred Astaire in a pair of true natural waisted trousers (trousers that come up to your natural waist) reminds me of the "Happy Pants" song. 
"Put on your happy pants, in your happy pants, you’ll laugh a while!" 
(Photo via A Suitable Wardrobe)

This photo of Fred Astaire in a pair of true natural waisted trousers (trousers that come up to your natural waist) reminds me of the "Happy Pants" song

"Put on your happy pants, in your happy pants, you’ll laugh a while!" 

(Photo via A Suitable Wardrobe)