John Karayiannis will represent Cyprus in the 'Eurovision Song Contest 2015' with the song 'One Thing I Should Have Done'. This is the correct page, as he uses this name on his official website, logo and social media.
Though communicated as Giannis Karagiannis through wikipedia.org and eurovision.tv, the brand communication from his official channels (website and social media) clearly state his artist name as John Karayiannis. That makes John Karayiannis the correct tag.
Four years of hard work!This month of May we celebrated four years on the air. We continue working on the dissemination of this wonderful instrument, thank you for participating in our story!