I think it's safe to assume that most of us here are probably fans of Chuck's voice. Therefore, I thought it would be cool to gather here all of his performances (as a lead singer or doing just back up vocals) on other artists' songs. Here's what I recall. 1.  MORDRED - Fool's Game. I can't remember what song Chuck did backing vocals on. It might have been the whole album (or all of the songs that have gang choruses, anyway) - it's not been specified in the CD's booklet (there is a bunch of back up vocalists there BTW, incl. M. Coons from Laaz Rockit). 2.  JAMES MURPHY - Convergence. Here Chuck sings the wonderful ballad, Touching the Earth. Supporting him is Michelle Rae Dean. 3.  STUCK MOJO - Rising. Chuck did back up shouts on the Atlanta-based rap metal pioneers' song Back in the Saddle. 4.  JAMES MURPHY - Feeding the Machine. This time Chuck sang a heavier song on James' solo album (but not The Gathering heavy like, more modern). The title is No One Can Tell You. Unfortunately, it's not up on YT. I've got this album on a cassette and haven't listened to it in quite a few years. If my memory serves me well, there was some reference in the guitars to Testament's Last Call (it might have been on another song off that album). (edit: found it on YT): 5.  SADUS - Out for Blood. Main vocals on Crazy. 6.  LIGHT THIS CITY - Stormhaser. Co-vocalist on Firehaven. I wonder how this collaboration with a metalcore band came about. Chuck's singing is pretty different than what we're used to here. 7.  SUSPERIA - Attitude. This, in turn, was not a surprise at all. I really like the duel of Chuck an Athera on Live My Dreams, even if this album may not be Susperia's best. 8.  FORBIDDEN - Omega Wave. Yet another shouted gang vox for fellow Bay Area Thrashers. You don't hear much Chuck there (but you can distinguish him and Zetro, of course), but it's still cool that the old friends gather from time to time and do some choruses on each other's records from time to time. Ok, that's all I can remember for now. I think Chuck must have done more backing up vocals for other Bay Area bands, but can't think of more songs off the top of my head. Feel free to supplement the list.