The only pop hit that King Crimson ever had, "Cat Food" still features odd times and has a more jazzy feel to it. One of the members of the band even commented how difficult it was for people to try and "dance" to it (the verse has a bar of 3/8 thrown in there). The keyboard part is absolutely absurd and is deffinatly the standout in terms of difficulty. Drums and guitar are challenging and while the bass part might be the easiest, it is still fun to play.
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