The Smothers Brothers' "Monday We Saw on TV". I believe I posted the full lyrics in a different thread some time ago. It's a cumulative song, like "The Twelve Days of Christmas", and starts:

Monday we saw on TV a toy to buy for Christmas:
A sexy Sally doll with skin-tight stretchpants.
Oh boy, oh boy, we really gotta get that toy!


[Includes a coupon for a Baby Jesus action figure: fries heretics with his laser eyes! Ox and ass sold separately.]