KING OF POP

Jermaine Jackson -- a major ringleader in the Jackson family rebellion against the MJ Estate -- has officially defected from a family letter criticizing the Estate ... but still has "deep reservations" about the executors.

Jermaine just đã đăng a long letter on his Twitter account, writing, "I rescind my signature from the letter which was sent to the Estate, and which should never have gone public."

"I still hold deep reservations about many issues involving the Estate, and I will continue to bring scrutiny and a resolute voice wherever we have cause for concern. But the way to address such...