LEN COMPILATION「LC」 is a Len-only compilation album. It contains 15 tracks, all sung by Kagamine Len. The album was first released at THE VOC@LOID M@STER 16. The concept is: "An album by Len fans, for Len fans." A crossfade of the album can be heard on Niconico. The album is purchasable on D-STAGE and Toranoana.