Singer Janet Jackson said yesterday, that she would not attend her brother Michael Jackson's tribute concert, because it coincides with the trial of the singer's doctor. "Because of the trial, the timing of this tribute to our brother would be too difficult for me," Janet Jackson said in a statement. Jackson's mother Katherine, and his sister LaToya have backed plans for the "Michael Forever Tribute" concert, in Wales on October 8TH. But the event is opposed by brothers Randy and Jermaine, and some fans are unhappy with the organization of the event. Christina Aguilera, Cee Lo Green, and Smokey Robinson are due to headline the concert. The concert will take place in the middle of the highprofile trial in Los Angeles, of the "Thriller" singer's physician, Dr. Conrad Murray. Murray is accused of giving Jackson a lethal dose of the anesthetic propofol, and failing to monitor him properly, leading to his death in June 2009.