Bobbi Kristina Brown remains on life support, but doctors have told her father Bobby Brown there is nothing more they can do to help her.

Bobby Brown's 21-year-old daughter with his late ex-wife Whitney Houston is clinging to life in a Georgia hospital intensive care unit after she was discovered facedown in a bathtub and unresponsive last Saturday morning. The aspiring singer and actress has been in a medically induced coma since the weekend, suffering diminished brain function and breathing on a ventilator.

"Everyone is coming to the hospital to say goodbye," a family member told People magazine Thursday.

"Bobby has been crying nonstop since yesterday," the insider said. "We are grieving."

"It's sinking in that this is it, but we're all still praying that God will intervene and heal her body," a second relative told People.

TMZ said Bobbi Kristina's 81-year-old maternal grandmother Cissy Houston has not yet seen her at Emory University Hospital, but she plans to go as soon as possible.

Bobby Brown, whose 46th birthday is Thursday, reportedly is waiting to make a decision regarding his daughter's life support until after the weekend in the hopes that she might wake up, since a distant relative of his came out of a coma after eight days.

Houston accidentally drowned in a hotel bathtub while intoxicated Feb. 11, 2012. She was 48.