Prior to its dramatic exit from the music games business, Activision had a karaoke game in the works – Sing Hero. Not much is known about the game beyond its use of fan numbers as a scoring device. Siliconera has a couple of assets from the shelved title, which was in the works at Rock Band Wii port developer Pi Studios. The developer has since closed, and although Activision has renewed its Sing Hero trademark, it looks like this once has been abandoned. Hit the link to pick over the bones.