Possible Clues:

• What you feel 'when the moon hits your eye like a big pizza pie'
• Love, at La Scala
• Romeo's love
• Frequent Verdi aria subject
• "That's ___" (Dean Martin love song)
• Love, to da Vinci or Dean Martin
• 'When the moon hits your eye' feeling
• La Festa di San Valentino emotion
• Love, in Liguria
• Love, in Torino