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The Guitar Hero Challenge is doing a girl doggy style while trying to complete a song on expert difficulty.

You can win by either completing the song or cumming while still playing. You automatically get 5 stars for the song if you cum while the song is still on and manage to somehow finish the song.
"Hey, let's bang while playing Guitar Hero. Will call it the Guitar Hero Challenge."
by Milton Wants Sex Bradley March 13, 2009
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