鉄は唄う (Iron Sings) is Hikari Syuyo (光収容) 8th album, consist of 9 tracks, all rock songs sung by Kagamine Rin. A crossfade can be heard in Nico Nico Douga and is purchasable in iTunes store. CD purchase (Available): D-STAGE. It was released in The Voc@loid M@ster 28 Event.