He seems to have FC'd every song with every instrument (Including Pro, ie plastic guitars with 100+ frets) along with the 100 or so other various challenges in the game.
Edit: Five Star, not FC.
http://rockband.scorehero.com/forum/viewtopic.php?t=33965&postdays=0&postorder=asc&start=175
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XBL: Mik Pick
PSN: Mik2Pick