VAN HALEN guitarist Eddie Van Halen was in attendance at last night's (Wednesday, October 3) concert by CREED and ALTER BRIDGE guitarist Mark Tremonti at Beaumont Club in Kansas City, Missouri.VAN HALEN bassist Wolfgang Van Halen made his first appearance as part of Tremonti's solo band last month at a show in Rhode Island. This marks the first time Wolfgang has played with anyone outside of his father Eddie, his uncle Alex and singer David Lee Roth. After last night's show, Wolfgang tweeted, "So glad my pop got to see the TREMONTI gig tonight in KC!" Eddie Van Halen recently spent three weeks in the hospital after undergoing emergency surgery for diverticulitis. Wolfgang Van Halen is replacing Tremonti's bandmate from CREED and ALTER BRIDGE, Brian Marshall, who is sitting out the Tremonti trek for undisclosed personal reasons. The other members of Tremonti's touring band include Eric Friedman on guitar and Garrett Whitlock on drums. Tremonti is on the road behind his debut solo album, "All I Was", which came out this past July.