Los Angeles - Bobbi Kristina Brown has suffered "irreversible brain damage".
The 22-year-old aspiring singer was placed in a medically-induced coma after being found unresponsive in her bathtub in January, and though her father Bobby Brown recently revealed she is now "awake", her grandmother Cissy Houston - the mother of the young star's late mother Whitney Houston - says she is still "unresponsive".