The big production number "A Rainy Night in Rio" was featured prominently in the Bugs Bunny short "Long-Haired Hare". In the short, Bugs Bunny disrupts a burly opera singer's rehearsal of The Barber of Seville by singing A Rainy Night in Rio loudly nearby. The opera singer - Giovanni Jones - overhears Bugs Bunny's rendition of the song and absent-mindedly sings along in operatic style. Jones loses his temper repeatedly and accosts Bugs Bunny violently, resulting in Bugs stating his famous and oft-quoted line: "Of course you know this means *war*!" The short proceeds with a sequence of humorous retaliations from Bugs Bunny at Jones' performance later that evening at the Hollywood Bowl.
Martha Vickers was dubbed by two different singers: one for the pop songs, and another for the operatic songs.
Rose Bascom was called the "Queen of the Trick Ropers" and has been inducted into National Cowgirl Hall of Fame and the Utah Rodeo Hall of Fame.
No connection to the 1929 film of the same name, also from Warner Brothers.