1958 Oscar winner for Best Original Song

• Oscar-winning musical
• Musical based on a Colette novella
• Musical with the song "The Night They Invented Champagne"
• 1951 title role for Audrey
• Hit song in 1958
• 1958 title role for 21-Across
• 1958 Best Picture, and this puzzle's title
• Chevalier vehicle
• "I Remember It Well" musical

Wikipedia Word definitions in Wikipedia
Gigi is either a baby doll made by Zapf Creations in Germany or an original walking doll made by A&H . There has also occasionally been a doll line that's been named Gigi though not with the popularity of the others.