Toni Braxton's 24-year-old niece Lauren Braxton has died.
Lauren Braxton, who is the daughter of Toni's younger brother, Michael Conrad Braxton Jr, died Monday.
Her father told TMZ Lauren's death was related to a heart condition.
Police received a 911 call at around midday and found Lauren - who went by the nickname Lolo - lying unconscious at her home in Maryland.
She was subsequently declared dead by paramedics.
Lauren was last active on social media six days ago when she shared a throwback of herself as a baby sitting in a high chair.
"I still stay eating to this day," she joked in the caption.
Toni has previously opened up about her own heart problems, revealing she was diagnosed with microvascular angina in 2008.
In November 2010 she confirmed she's also suffering from auto-immune disease lupus - which her uncle died from.
Her brother - Lauren's dad - is also a carrier of the disease, and her reality series Braxton Family Values saw her undergo surgery in 2012 for "minor health issues" related to the disease.