Velko has 4 U.D.O. concerts.

U.D.O. is a German heavy metal band founded by lead vocalist Udo Dirkschneider in 1987. Following Udo Dirkschneider's departure from Accept in 1987, he formed his own band called U.D.O. He recruited guitarists Mathias Dieth and Peter Szigeti, bassist Frank Rittel and drummer Thomas Franke. They released their debut album titled Animal House on 3 November 1987, which was entirely written by Accept. They would tour with the likes of Guns N' Roses, Lita Ford and Zodiac Mindwarp.