"Itsy Bitsy Teenie Weenie Yellow Polkadot Bikini" is a novelty song telling the story of a shy girl wearing a revealing polka dot bikini at the beach. It was written by Paul Vance and Lee Pockriss and first released in June 1960 by Brian Hyland, with an orchestra conducted by John Dixon. The Hyland version reached number one on the Billboard Hot 100, selling a million copies in the US, and was a worldwide hit. The song has been adapted into French as "Itsy bitsy petit bikini" and into German as "Itsy Bitsy Teenie Weenie Honolulu-Strand-Bikini", reaching number one on national charts in both languages. Several versions of the song have proved successful in various European countries. In 1990, a version by British pop band Bombalurina, titled "Itsy Bitsy Teeny Weeny Yellow Polka Dot Bikini", reached number one on the UK Singles Chart and in Ireland.

Source: Wikipedia