Biography
Original Cast is the name of more than one artist:
1) Electronic dance music
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2) an alias of Original Israeli Yiddish Cast
But most track here appears here due to incorrectly tagged tracks for a various broadway shows. If this is the case, do last.fm and yourself a favour. Fix your tags by putting the actual artist name in the artist field. Not the show name, not "original cast", but the actual artist name.
Biography text from Last.fm, available under CC BY-SA.