Bobbi Kristina Brown was reportedly a 'regular drug user'

The 21-year-old daughter of the late Whitney Houston is currently fighting for her life in hospital after she was found unresponsive in a bathtub at her home in January and regularly took drugs and drank heavily, sources tell People magazine.

Since her mother passed away in February 2012, Bobbi was "in and out" of rehab and the recent anniversary of her mother's death had fuelled her addiction further, according to a source.