Prince Woman Comes Out Of Woodwork For Chunk of Fortune

[CORREA]

Prince's riches might get split 7 ways instead of 6 because a woman is claiming she's entitled to a cut of the late singer's multi-million dollar estate.

Lawyers for Darcell Johnston filed legal docs in Prince's probate case saying she's a beneficiary.

Sources close to Prince's family tell us Darcell is claiming to be a long lost half sister ... same mother, but different father from the singer. We're told some members of Prince's family only learned of Darcell's existence a few days ago. 

We broke the story ... Prince didn't have a will, so by Minnesota law his estate should be split equally among his 6 surviving siblings.

As special administrator of the estate, Bremer Trust bank will look into the legitimacy of Darcell's claim, although the court will have final say.

We've reached out to Darcell to see if she had any relationship with Prince. So far no word back.

update

Sinead O'Connor is blaming Prince's drug problems on his good friend, Arsenio Hall -- but he says the Irish singer is totally full of it.

Sinead went on the attack, saying ... "Two words for the DEA investigating where (sic) prince got his drugs over the decades ... Arsenio Hall (AKA Prince's and Eddie Murphy's bitch)."

She went on to say on her Facebook page ... she's actually reported Arsenio to the Carver County Sheriff's department, which is investigating Prince's death.

A rep for Arsenio says Sinead's claim is "absolutely false, ridiculous and absurd."

She can thank Prince for writing her biggest hit, "Nothing Compares 2 U" -- but fact is, Sinead was NOT close to Prince ... and she's made other outrageous claims about him. She once alleged he punched her and held her against her will at Paisley Park.

update

There's a twist in the brewing war among Prince's brothers and sisters ... it involves a missing persons report and allegations one of the singer's siblings is trying to wrest power from the group.

Our sources say last Friday ... someone filed a missing persons report/welfare check involving Alfred Jackson, the elder half brother of Prince. According to the report, Alfred is disabled and has been living in a V.A. facility near Minneapolis. 

The person who filed the police report claims Alfred just left the facility and no one could find him.

Here's what's interesting. TMZ broke the story ... Alfred was in a meeting last Thursday with Prince's other brothers and sisters. We publicized the meeting on the website. It's odd someone filed a missing persons/welfare check report the next day.

Our sources say Alfred believes the person who filed the report is a sibling who is trying to get him declared mentally incompetent so they can get power of attorney and a second vote in what is turning into a battle over Prince's estate.

We're told Alfred and his lawyer, Frank Wheaton, went to the Minneapolis Police Dept. over the weekend to prove he was fully competent. Alfred presented proof he's got his meds, is taking them and is of sound mind. We're told the missing persons case is now closed.