String Trio Cello,Viola,Violin - Level 1 - Digital Download SKU: A0.1211337 Composed by Lynn Ahrens and Stephen Flaherty. Arranged by André Nusa. Children,Film/TV. 15 pages. Andre_Nusa #809002. Published by Andre_Nusa (A0.1211337). String trio arrangement of the song Once Upon a December from Disney's movie Anastacia.