Bret Michaels Remains in Critical Condition

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Bret Michaels performs live at the House of Blues on March 20, 2009 in Atlantic City, New Jersey.

Despite previous reports that Bret Michaels' condition had stabilized following a brain hemorrhage late Thursday, the Poison frontman remains in critical condition at an undisclosed location, according to a statement released on the rocker's Facebook page Sunday.

"At this point Bret remains in ICU in critical condition," the statement reads. "He is under 24 hour doctors care and supervision. We are hopeful that further tests will locate the source of the bleeding, which has still not been located. As we all know Bret is a fighter and we are hopeful that once all is complete the slurred speech, blurred vision and dizziness, etc. will be eliminated and all functions will return to normal."

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Joann Mignano, Michaels' New York-based publicist, confirmed a report on People magazine's website that said Michaels was rushed to intensive care late Thursday after a severe headache. The report said doctors discovered bleeding at the base of his brain stem.

Mignano said tests are being conducted but did not know where he was being treated.

The 47-year-old glam-rock reality TV star had an emergency appendectomy at a private care facility for diabetics last week after complaining of stomach pains before he was scheduled to perform at Sea World in San Antonio, Texas. Michaels later wrote on his website that though the surgery "has taken its toll," doctors expected him to make a full recovery.

Michaels is currently a contestant on the third season of Donald Trump's NBC competitive reality show, "The Celebrity Apprentice." For the first six episodes, Michaels served as a lighting rod for the show's male team, avoiding being fired in the boardroom.

Trump said in a statement Friday that he was "deeply saddened" to hear of Michaels' condition.

"He's a great competitor and champion, and I hope he will be fine," Trump said.

(Additional reporting by M. Tye Comer)