Gay used to mean happy. "Eurovision is so happy" doesn't quite work though, so i'll assume you meant "Eurovision makes me so happy", which basically means you enjoy it, possibly "I love Eurovision".
I only saw norways contribution, haven't even seen sweden's, even once, and I was rather upset that the Norwegian singer wasn't female, because I pictured any Norwegian contribution to have a female singer. Someone with a pure voice, like sissela kirkjeb (or however that's spelled)
http://www.youtube.com/watch?v=poILi0EvJycI didn't much like the winner, but it could possibly grow on me, and for the rest, I don't really know since I didn't watch.
I think the last eurovision I watched was 2003, and I in particualir I remember liking this:
http://=http://www.youtube.com/watch?v=BYw4Ze1nK2kThere were also some kind of song with a made up language there which was really good.
EDIT:
http://www.youtube.com/watch?v=xTLMAIVweH8Actually I think a lot of these conributions are somewhat embarrassing, especially in their visualization.
EDIT 2: Well, finland got a few votes, so I needed to check it out, and it was rather good too. If you'd add some catchy synth or guitarr riff as a main theme, in the way that Bombfunk's freestyler has it's spacy guitarr intro, or somewhat like that. A good buildup, and a nice riff to get your attention, I think this song could have made it far. As it is now, it lacks somewhat in, well anything to set it apart really.