Bobbi Kristina was found unconscious in a bathtub in her home -- and taken to a hospital where she is now breathing ..
Bobbi Kristina Brown's husband Nick Gordon and a friend found her in the tub ... according to police in Roswell, GA. We're told her husband and friend immediately started CPR on her ... until police and paramedics arrived.
We're told police took over life-saving measures on the scene -- and then she was taken by ambulance to a hospital.
Doctors have now stabilized her breathing.
Still unclear why Bobbi fell unconscious. We're told a friend made the call to 911 from Bobbi's house.
The circumstances are not yet known
Story developing ...