Well I think if you're going to go by the sheer impact that a song had on the music industry, I think you have to look at Lil Wayne "Lollipop", Katy Perry "I Kissed a Girl", and T.I. "Whatever U Like"
Those are all songs that really boosted their respective artists into the mainstream, and let's face it - any of those three songs were EVERYWHERE during their peak and are songs that are really going to transcend time to where in 20 years, we're saying "You remember that song?"
My favorite CHR record of the year - Coldplay "Viva la Vida"
Artist of the year - Lil Wayne. I hate the guy's stuff personally, but he had a HUGE year. Honorable mention to Britney for actually making a legit comeback.
CHR station of the year - Z100 in NYC, B96 in Chicago