At first when I saw this this morning I thought it was just a rumour, but several sites like AppleDaily reported it so... Jay Chou (周杰倫) will be the guest at Shanghai (May 21st) & Beijing (May 28th)'s concerts!! It seems that he was the secret guest Jolin...

Pics again thanks to Gwart blogbus! More pics on the forum This CF is supposed to be revealed in June.