'The Voice' coaches Christina Aguilera and Cee Lo Green are the first big names confirmed for the Michael Jackson tribute concert on Oct. 8 in Wales.

Billboard reports that promoters for Michael Forever: The Tribute Concert have confirmed the A-list bookings. Other artists scheduled to appear include vocalist Leona Lewis, R&B singer Craig David, Motown legend Smokey Robinson, and rockers Alien Ant Farm.

We're pretty sure we know which song Alien Ant Farm will be playing, since they recorded a hit cover of the King of Pop's 'Smooth Criminal' in 2001. We'd love to see Cee Lo perform a fun song like 'Wanna Be Startin' Somethin'' during his set, while Christina would be well-suited to cover a vocal ballad like 'You Are Not Alone' or 'Man in the Mirror.'

Global Live Events executive Paul Ring promises a lot more big names. "This announcement is just the beginning. We have many more to announce," he says. "This concert will unite various generations and musical genres, reminding everyone of just how amazing a talent Michael was."

Fans are eligible to sign up for a lottery, which will be used to determine who can purchase tickets. Katherine Jackson is scheduled to discuss more about the tribute during an interview Monday on CNN. Michael's brothers Jermaine and Randy have publicly stated their disapproval of the event, releasing a statement that read, "While we wholeheartedly support the spirit of a tribute that honors our brother, we find it impossible to support an event that is due to take place during the criminal trial surrounding Michael’s death."

The involuntary manslaughter trial for Jackson's physician, Dr. Conrad Murray, is scheduled to begin in September. He is accused of administering a fatal dose of the anesthetic propofol, causing Jackson's death in June 2009.