Tchaikovsky's "Garland Waltz," from one of his ballets, had lyrics added for this love theme from a 1950s Disney movie, which was an adaptation of the same source material of the earlier ballet. Name this SONG, which was re-recorded by Lana Del Rey for Disney's 2014 movie remake (the song has a different title from both of the movies it featured in).
ONCE UPON A DREAM (from Sleeping Beauty and Maleficent)