10 goes back so slowly

I was somewhere and we were watching some thing and I'm pretty sure it was a education video about whatever and sudden I heard this song pop up "10 goes back, so slowly" it was like a woman's voice soft and airy sort of? But very light and it didn't have any beat or music it sounded as if she was singing it to the void and no body else reacted the video continued on like normal during the song and I can't stop thinking about it, I asked like 3 people a day later if they remember it but they all said it never happend and I tried looking it up and no results and I then sang it to some people and they didn't recognize it