“Singin’ in the Bathtub” was Warner Brothers’ answer to rival studio MGM’s “Singin’ in the Rain”. Introduced in 1929’s Show of Shows, it was reused in many later films, including Tweety Bird and Bugs Bunny cartoons.

Warner’s very first Looney Tunes cartoon, “Sinkin’ in the Bathtub”, used it too. Its 1930 copyright wasn’t renewed, and since this song and others featured in it were published in 1929 or earlier, everything in it should be public domain in 45 days. #PublicDomainDayCountdown