Carmen (opera)
From Tardis Wiki, the free Doctor Who reference
Carmen was an Earth opera that Oswin Oswald enjoyed. The Eleventh Doctor called it a "lovely show". An aria from it, "L'amour est un oiseau rebelle", played in the Parliament of the Daleks as a signal sent from Oswin's imaginary room aboard the starship Alaska. (TV: Asylum of the Daleks)