So:

Andrew O'Neil, comedian, did a reference to a song.

He sang to his cat:

You're so fluffy!
You're so fluffy!
You're so fluffy!
Yeah!

In a sort of metal styling.

My question is what is the original song?

I vaguely remember hearing it before as "lucky" rather than fluffy. But a Kpop band did a song in 2015 that has stymied my Google fu.