Michael Jackson Tribute Concert Rehearsals for the Big Show

10/8/2011 9:50 AM PDT BY TMZ STAFF
Michael Jackson's children, along with his brothers and sister La Toya, were among those that took the stage today for rehearsals before tonight's big "Michael Forever" tribute concert in Cardiff, Wales.

Among the expected performers tonight -- Christina Aguilera, Smokey Robinson, Gladys Knight, Leona Lewis, British boyband JLS, Cee Lo Green, and Beyonce (via satellite).