Template:Infobox song contest entry "'t Is OK" (English translation: "It's OK") was the Dutch entry in the Eurovision Song Contest 1978, performed in Dutch by the trio Harmony. The song was composed by Eddy Ouwens, who previously had written the Netherlands' winning entry at the 1975 Contest, Teach-In's "Ding-A-Dong". "'t Is OK" charted at #29 in the Dutch singles chart in the same year.
The song is an up-tempo number about the power of a happy song itself. The band explains that all one needs to brighten one's day is to sing a song "happy and in harmony". The group also recorded an English-language version of the song, with a minimal change to its original Dutch title; "It's OK".
The song was performed eleventh on the night, following Belgium's Jean Vallée with "L'amour ça fait chanter la vie" and preceding Turkey's Nilüfer & Nazar with "Sevince". At the close of voting, it had received 37 points, placing 13th in a field of 20.
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