This has been posted on the official Michael Jackson fanpage. I just thought the date they chose was a little amusing.
"Due to popular demand, the Michael Jackson THE IMMORTAL World Tour by Cirque du Soleil in CityVille will be sticking around until Tuesday, November 29. CityVille players have had more than 20 million conversations with the character dressed as Bubbles the Chimp already! Make sure you're one of them!"