One who appears to be important or popular based on the complexity of their myspace page. Often these people have a massive number of friends/comments, but in reality are considered losers within the social hierarchy. Myspace champions also have lots of photos, and post tons of pointless blogs in a futile attempt to gain online popularity, in false hope that online popularity will lead to even a small amount of social success in the real world.
Normal guy #1 - "Did you know that weird emo girl in our calculus class has a myspace? It's actually quite sophisticated and she has tons of photos!"
Normal guy #2 - "Oh yeah, that's Kayla. She's actually kind of a loser, I don't think she has any real friends."
Normal guy #1 - "I guess she's just another MySpace champion..."