The cavatina "" is an aria for Figaro from the first act of the opera The Marriage of Figaro by Wolfgang Amadeus Mozart. The libretto was written by Lorenzo Da Ponte based on a stage comedy by Pierre Beaumarchais, La folle journée, ou le Mariage de Figaro (1778). The Italian title means "If you want to dance". Figaro's voice type is given as bass in the score, but in modern performance practice is sung by a bass-baritone.
Susanna has told her fiancé Figaro that the count intends to exercise his newly reasserted feudal , the , to sleep with her before their marriage. Figaro sings of how he will unravel the count's schemes and thwart him.
Beethoven wrote a series of 12 variations for piano and violin, WoO 40, on the theme of "".