Ok, I found that Soilwork info. Chuck sang "Follow the Hollow" with them (one of his favourite bands back then) on June 6th, 2002 at the Cactus Club in San Jose. This was his first live performance since "Into the Pit" at Thrash of the Titans.
Here's what DE wrote about it. Too bad the video he recorded never ended up on YT. http://www.ultimatemetal.com/forum/steve-digiorgio/30337-chuck-billy-sing-soilwork-san-jose.html
Here's what DE wrote about it. Too bad the video he recorded never ended up on YT. http://www.ultimatemetal.com/forum/steve-digiorgio/30337-chuck-billy-sing-soilwork-san-jose.html