NEW : Some Michael Jackson 's fans object to KISS performing because of Jackson comments . NEW : Many of Jackson back up musician will reuniute for the tribute . Christina Aguilera , Leona Lewis , Smokey Robinson , Jackson and JLS are also signed . Two generations of the Jackson family will take the stage in the Cardiff , Los Angeles , show .
NEW : Some Jackson fans object to KISS performing because of Gene Simmons ' comments . NEW : Many of Michael Jackson 's back up musician will reuniute for the tribute . Christina Aguilera , Leona Lewis , Smokey Robinson , Cee Lo Green and JLS are also signed . Two generations of the Jackson family will take the stage in the Cardiff , Wales , show .