Giannis Karagiannis (Greek: Γιάννης Καραγιάννης) (born 25 July 1994), sometimes credited as John Karayiannis, is a Cypriot singer and songwriter who represented Cyprus in the Eurovision Song Contest 2015 with the song "One Thing I Should Have Done".

[1] Previously he tried to represent Cyprus in their national final for the Junior Eurovision Song Contest in 2007 and 2008.

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