High Quality Content by WIKIPEDIA articles! The XXX World Tour 2000 was a concert tour by American rock band ZZ Top. The tour supported their thirteenth studio album, XXX, released on September 28, 1999. The European dates in June and July were postponed due to bass player Dusty Hill contracting Hepatitis C. A concert tour is a series of concerts by a musician, musical group, or some number of either in different cities or locations. Especially in the popular music world, such tours can become large-scale enterprises that last for several months or even years, are seen by hundreds of thousands or millions of people, and bring in millions of dollars (or the equivalent) in ticket revenues.