Movie: Anastasia
Year: 1997

Lyrics:

[MUSIC]

Dancing bears painted wings
Things I almost remember
And a song someone sings
Once upon a December

Someone holds me safe and warm
Horses prance through a silver storm
Figures dancing gracefully
Across my memory

[MUSIC]

Someone holds me safe and warm
Horses prance through a silver storm
Figures dancing gracefully
Across my memory

Far away, long ago
Glowing dim as an amber
Things my heart used to know
Things it yearns to remember

And a song someone sings
Once upon a December

How old were you when you found out this is not a Disney movie? I think I was about ten or twelve.