L'ho perduta

Barbarina's aria from the Opera Le Nozze di Figaro.

'Le Nozze di Figaro' is one of the three 'da Ponte' opera's which Mozart composed on libretto's of Lorenzo da Ponte (1749-1838) the famous Viennese theater director and court poet.
The aria 'L'ho perduta' is sung by Barbarina (the gardener's daughter) at the beginning of the fourth act of the Opera: She is worried because she has lost the pin that was stuck in the letter which Susanna slipped to the Count during the wedding dance.