Bobbi Kristina Brown
Bobbi Kristina Brown remains in a medically induced coma.

Bobbi Kristina Brown's family have said they are praying for a miracle.

The 22-year-old daughter of Whitney Houston and Bobby Brown remains in a medically induced coma, two months after she was found face down and unresponsive in a bath tub in her Roswell home.

The reality TV star had been receiving treatment at Georgia's Emory University Hospital but has since been moved to an undisclosed rehabilitation centre nearby. The new facility is said to be better for long-term care. However, so far there have been few signs of improvement in her condition, with her grandmother CeCe Houston admitting "there's not a lot of hope."

Bobbi Kristina's godparent's gospel singer BeBe Winans and his sister CeCe, told The Inquisitr the family are not ready to give up on her.

"Bobbi Kristina is my godchild, CeCe's goddaughter," said BeBe. "Whitney and us were very, very close. My children were Whitney's godchildren. It's very difficult... It's family. So we do all that we can, coming down – CeCe's been down there constantly. And we're just praying. That's what we know to do. We believe in miracles and so it's very, very difficult."

"It's hard to even imagine, it really is. You know, Whitney, it's someone like my brother Ronald who passed — I think of her every day. And you just want the best for Bobbi Kristina, so we ask everyone to continue to pray that a miracle does happen, and that's what we need."

Well-wishers have been invited to leave messages of support using the hashtag #PrayForBK.

Police are investigating the incident as a criminal case, after Bobbi Kristina was found with bruises on her body.