Bobbi Kristina Brown has 'irreversible brain damage'

Bobbi Kristina Brown has suffered ''irreversible brain damage'' and remains unresponsive, her grandmother Cissy Houston has revealed. 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''.