Solo Guitar - Level 4 - Digital Download SKU: A0.1139032 By Plamen Petrov. By David Newman. Arranged by Plamen Petrov. Film/TV. Individual part. 6 pages. Plamen Petrov #739314. Published by Plamen Petrov (A0.1139032). Once Upon a December is the third song on the soundtrack for Anastasia, an Academy Award nominated American animated feature musical film produced in 1997 by 20th Century Fox .