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The Netherlands was represented at the Eurovision Song Contest 1978 with the song "'t Is OK", composed by Eddy Ouwens, with lyrics by Toon Gispen and Dick Kooiman, and performed by the band Harmony. The Dutch participating broadcaster, Nederlandse Omroep Stichting (NOS), selected its entry through a national final.
On the night of the final Harmony performed 11th in the running order, following Belgium and preceding Turkey. Along with the United Kingdom's Co-Co, Harmony came in for some criticism for their garish and clashing stage costumes. At the close of voting "'t Is OK" had received 37 points from eight countries, placing the Netherlands 13th of the 20 entries. The Dutch jury reciprocated the Israeli 12 points by awarding its 12 to contest winner "A-Ba-Ni-Bi".