We dare say there are some avid Nintendo fans who've known about this for years, but for the rest of us, it comes as a big surprise to discover that the familiar theme music to the Mario Bros. games has lyrics.
This version was released on vinyl by Nintendo in 1985. The tune, written by Koji Kondo, didn't originally have words - they were composed by a fan for a competition on Japanese radio, and the games giant was so taken with them they produced this official release.
Hat-tip to Kotaku or unearthing this little-heard *cough* gem, and for the English translation of the lyrics. It resurfaced with the news (h/t also Attract Mode) that Nintendo is adding it to its Joysound a karaoke platform.