CLAMP is NOT a valid artist name. Please do yourself, and last.fm, a favor and fix your tags only placing the proper artist name on the "Artist" tag field of your music files. CLAMP is not a real musical artist but a popular Japanese all-female manga artist group. They are known for series such as Angelic Layer, Cardcaptor Sakura, and Chobits, to name a few.

Read more about CLAMP on Last.fm.

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