Bobbi Kristina Brown In Coma After Mysterious Collapse In Bathtub

It's been three days since Bobbi Kristina Brown was found face down and unresponsive in a bathtub in Roswell, Georgia. The 21-year-old daughter of singers Bobby Brown and the late Whitney Houston is reportedly in a medically-induced coma and her brain function is "significantly diminished."

Sources told TMZ today that doctors are saying they've run tests on Bobbi Kristina's brain function and she's showing some "minimal reaction." Although it's only a very small improvement, apparently it's enough to give doctors some hope and hold off on taking her off life support.

Bobbi Kristina's husband, Nick Gordon, and a friend discovered her in the bathtub in their home on Saturday morning, according to PEOPLE. Gordon tried to revive his wife with CPR until an ambulance arrived around 10:25 a.m., reported ABC News. It's not clear at this point what caused her to fall unconscious.

Roswell Police Department spokesperson, Lisa Holland, told the NY Daily News that they didn't find anything in Brown's home that indicated drugs were involved.

Her mysterious collapse bore an uncanny resemblance to her mother's death three years ago. Houston was discovered unresponsive in a bathtub in the Beverly Hilton on Feb. 11, 2012 before she was pronounced dead. An L.A. County coroner found that Houston's death was caused by "effects of atherosclerotic heart disease and cocaine use."

Bobbi Kristina has had a difficult time dealing with her mother's death. At one point she was hospitalized for an anxiety attack, and it's been rumored she has had drinking problems following that. But family and friends said she had turned over a new leaf since.

Her cousin, Jerod Brown (aka YF Kennedy) told E! News that she's been living a clean lifestyle. "Krissi doesn't do drugs," he said. "She hasn't been drinking or doing drugs and she's cut down on cigarettes. She's been trying to get her music together and keep her voice clean. Her voice is so beautiful."

On Friday, Bobbi Kristina even sounded happy and enthusiastic when she tweeted this message, just hours before she mysteriously fell unconscious:

Her longtime family friend Sammy Tawil told NY Daily News that Brown "sounded great" that Friday when she spoke to him about how she was going to L.A. soon to record in the studio.

Bobbi Kristina had starred in 2012 reality TV show, Houstons: On Our Own, which showed Brown and her family coping with the aftermath of Houston's death. And in 2013, she tied the knot with Gordon, who the family had taken in when he was a young child. The public accused the two of incest even though they weren't blood-related.

Before marrying Gordon, Bobbi Kristina wrote on Facebook: "I'm tired of hearing people say, 'Eww you're engaged to your brother or if Whitney was still alive would we be together or would she approve of this.' Let me clear up something. We aren't even real brother and sister, nor is he my adoptive brother," according to ABC News.