I downloaded it years ago when my son was about three years old and loved everything "fire truck." He is nine now, but we still occasionally listen to it and sing along. There are tons of good memories tucked into that song for the two of us. I don't know if it could be considered embarrassing, per se, but it doesn't really fit in much with the other songs I have.
When I first started scrolling through my tunes, I thought that I was going to say Batdance by Prince, but then I stumbled on some remixes that weren't cool when I put them together four years ago, and they're even worse now.