OurVisionSongContest is a user from 
Sweden. The account is used by 3 persons who are managing Ourvision Song Contest. Their names are Kristoffer, Nikolai and Paulina. They know each other in reality and have been going to the same schools for many years. They have other personal Youtube accounts as well which they only use when they are not managing their contest.
Kristoffer
Kristoffer. Just woke up after sleeping outside.
Kristoffer H. is a Swedish-English person who was born 1992 in Newcastle, United Kingdom but currently lives in Örebro, Sweden. He likes to play football and to dance. He is a student at the Örebro University. He has been an Eurovision fan since year 2000. His favourite Eurovision entry in 2011 was 
Slovenia.
OVSC duties: Kristoffer is managing the forums. He is sending most of the private messages and comments on Youtube. Just because he is being more social with other users doesn't mean he is doing more for the contest than any of the others, it's just his job.
Nikolai
Nikolai. Scary huh?
Nikolai A. is a Swedish-Norwegian person who was born 1992 in Stockholm, Sweden but currently lives in Nora, Sweden. He likes to play computer games. He has Asperger's syndrome. He has been an Eurovision fan since year 2006. His favourite Eurovision entry in 2011 was 
Belarus.
OVSC duties: Nikolai is managing the wiki and the website. He is also making all tables for the contest.
Paulina
Paulina. Is that an owl I heard?
Paulina I. is a Swedish person who was born 1994 in Karlstad, Sweden but currently lives in Örebro, Sweden. She likes to paint, write, photograph, sing, play the piano and much more. She has been an Eurovision fan since year 2003. Her favourite Eurovision entry in 2011 was 
Ireland.
OVSC duties: Paulina is making all videos. She is also managing the Twitter and Facebook accounts.