Hours after Brown, 21, was rushed to North Fulton Hospital, police and hospital officials declined to give any details about her condition, other than to confirm that she was alive.
Brown's husband, Nick Gordon, and a friend found her face down in a tub in the home in the Ellard subdivision and started CPR, police said.
When Roswell police officers arrived at 10:25 a.m., she was still unresponsive and they took over life-saving measures until rescue personnel arrived.
"Can't say how sad this is," Roswell Police Department spokeswoman Lisa Holland said. "It's a difficult situation for police officer to perform CPR on any person. "
Officers were still at the home where Brown was found late Saturday, investigating the incident, police said.