just written part of a song

this has happened before but I was feeling pleased, , in fact I became a little obsessed I was jotting down words more verses, I was strumming chords and humming in a quite annoying way but feeling quite smug and pleased with myself, it was quite catchy and in some ways familiar, in fact very familiar, hoping dash a rough version down to send a CD to my singing mate tomorrow, and then it happened, the i pod confirmed my fears I had in essence written a great song unfortunately that song had already been written and called Some Riot,.
Bollocks !

unlucky mate... done the same thing many times!!

It's gonna happen to a musician that listens to the same artists regularly. Which is most musicians in this age. Used to happen to me all the time, now I just write less.