Possible Clues:

• Ingrid, in ''Casablanca''
• ''Play it, Sam'' speaker
• She met Rick in Paris
• Rick Blaine's love
• Rick Blaine's love, in film
• Rick's love in a 1942 film
• Victor Laszlo's wife, in a classic film
• Lund of 'Casablanca'
• The "she" in "Of all the gin joints ... she walks into mine"
• 'Here's looking at you, kid' addressee