How do I get a song listed with Genius for iTunes

So many of my favourite songs are not covered by the iTunes Genius. I love the playlists Genius creates, so its like a slap with a cold fish when the song is not on the Genius list. Yes I have tried update Genius. How can we ask for the song to be covered. Genius misses so many fabulous classics like "Groove Armada - My Friend" and "Taylor Swift - Today was a Fairytale"

Any help would be appreciated fellow music lovers :-))