Prince and Paris Jackson, Michael Jackson's two oldest children, have been sweating over addressing the audience at tonight's Special Merit Awards ceremony .. where their dad will be honored with a Lifetime Achievement Award.

Joe Jackson tells TMZ Prince and Paris have each prepared a speech. Joe says they are both great speakers and Paris has been working on her speech for a week.

As for the buzz that the kids will perform at the Grammys on Sunday -- Joe says it ain't happening.


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