Chris Brown is scheduled to make a surprise performance at the mysterious unauthorized Michael Jackson memorial in Beverly Hills tomorrow ... TMZ has learned.
According to multiple sources, Brown -- who is not billed to appear -- will perform at least one song ... it's unclear if it's an original or if he'll cover an MJ classic.
As we first reported, the unauthorized "Forever Michael" memorial -- scheduled to go down at the Beverly Hilton -- was never approved by the Jackson estate ... yet for some strange reason, Katherine Jackson has given promoters her blessing.
Also set to perform -- one of Joe Jackson's business partners ... and you can guess who probably made that deal.
Chris Brown to Perform at Unofficial MJ Memorial
6/25/2010 8:00 PM PDT BY TMZ STAFF
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