Michael Jackson is considering legal action to stop his personal memorabilia from being included in a Jackson family auction.
Over 1,100 Jackson family items are due to be sold in "The Jacksons Auction" at Las Vegas' Hard Rock hotel on May 30 and 31, but the "Thriller" singer wants to stop the sale, according to Associated Press.
Michael's spokeswoman Raymone K. Bain said: "Mr. Jackson was not aware and he is extremely upset that his memorabilia was included."
Guernsey's auction house said items include Michael Jackson's gold record for his "Thriller" album, handwritten lyrics for The Jackson Five hit "ABC" and a "Victory Tour" program signed by the Jacksons.
There is also a test pressing of The Jackson Five's "I Want You Back," Marlon Jackson's glitter jacket, Randy Jackson's futuristic 1984 stage boots and a white fedora believed to be from Michael Jackson's "Bad" album music video.
The collection was owned by Florida luggage transportation company Universal Express Inc., which bought it last year from a New Jersey construction company owner.
The former owner, Henry Vaccaro, claimed a warehouse full of Jackson memorabilia during a bankruptcy case. Michael and his sister Janet sued to stop Vaccaro from taking ownership, but a Los Angeles judge threw Michael's claim out of court last year.
The status of Janet's claim is still unclear.