I spent many years not being particularly fond of It's A Marshmallow World, which struck me as kind of sappy and, well, silly. Maybe it's a function of getting older, and having a kid, but the song gets more charming with the years.
This version, with Frank Sinatra and Dean Martin from a Sixties Christmas special, appeals to me, largely because it reminds me of what TV specials were like when I was growing up: hokey, canned laughter, and what my dad would call fakey-fakey. Yet, it makes me laugh. The song appeared on the Christmas with the Rat Pack compilation that was produced seven years ago, to tie in with the resurgence of all things Frank that came with the Ocean's 11 franchise.