Beyonce's sister Solange Knowles, right, is keeping a vigil by the bedside of her business partner who is fighting for her life after being stabbed 10 times during an argument over another woman.
Nola.com reports that Armina Mussa, 24, (pictured above left) is in critical condition in the ICU at a New Orleans hospital.
Police arrested Arronesia Christophe, 26, a friend of Mussa's lesbian lover and roommate, and charged her with attempted 2nd degree murder and aggravated assault.
The violent altercation occurred at about 7:30 p.m. on Wednesday.
Court records obtained by Nola.com show Christophe told police she stabbed Mussa in self-defense.
Christophe, pictured right, said she was visiting Mussa's roommate, whom she described as a former high school classmate. She said Mussa emerged from the apartment and began yelling at her to leave.
Christophe reportedly grabbed a small knife from the console of her car and said, "We're just friends, why do I have to leave?"
She told police that's when Mussa grabbed her by the hair and began punching her.
Christophe told police she swung the knife wildly at Mussa. She said she didn't realize she was slashing the woman until Mussa stepped back and said, "you stabbed me," according to court records.
Christophe called 911 and remained at the scene until police and emergency responders arrived.
Police described Mussa's wounds as "potentially fatal," including a deep stab wound to her neck.
Knowles reportedly cancelled a gig at Coachella and flew back to New Orleans to be with her friend on Thursday.
The singer attended Christophe's first appearance at Orleans Parish Criminal Court on Thursday.
Christophe, a college grad who works at Target, is being held on $50,000 bond.
Mussa is Solange's business partner. The two women manage a clothing boutique -- and Mussa is the project director for Solange's new album.
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