The Michael Jackson tribute concert in Wales is in disarray after the headline act — The Black Eyed Peas — withdrew from the event at the eleventh hour after a feud with organizers, RadarOnline.com has exclusively learned.

A source close to the event confirmed: "The band advised on Tuesday that they would not be performing and returned the deposit they were paid. Everyone involved in the event is in shock."

There has been no official announcement from the band, but event organizers confirmed the news to RadarOnline.com saying, “It was confirmed yesterday and no reason, sadly. Everyone else is rehearsing and it looks amazing.”