What's this song?
I've sequenced my memory of the piano & bass parts here so you can listen: https://onlinesequencer.net/1181005 This repeated sequence makes up a big chunk of the song, but there's also a chorus (which I can sequence too if necessary). There may be minor errors in the piano chords but the bass line is accurate and the sequence is in the correct key (not transposed).
The primary instruments are electric bass, guitar, piano (possibly synthesized) and something that kinda sounds like jingle bells.
It's mostly instrumental, except for some humming in the chorus ("ahh-ahh-ahh-ahhhhhh") followed by, I think, a single short sentence, maybe 3 or 4 words - which of course I don't remember.
It may have been used in a film or commercial, but my memory may be deceiving me here. Not that this narrows it down all that much these days!