Bobby Brown
Bobby Brown currently shares guardianship of his daughter with Pat Houston.Reuters

Bobby Brown has admitted that he is struggling to cope with his daughter Bobbi Kristina's deteriorating health.

When approached by photographers outside of Mr Chow in Beverly Hills, California, the solemn star opened up about his ordeal as his pregnant wife, Alicia Etheredge, consoled him.

In a video posted online he says "It's hard" after a photographer asked how he is finding the strength to get through the difficult time.

Brown, 46, then went on to add that he and his family are "definitely" still praying for the 22-year-old, five months after she was found face down in a bath tub.

Bobbi Kristina was found unconscious at her home in Roswell, Georgia, on 31 January 2015, shortly before the third anniversary of her mother Whitney Houston's death.

On 25 June, she was moved to the Peachtree Christian Hospice near Atlanta having spent two months at Georgia's Emory University Hospital and a further 10 weeks at the DeKalb Medical facility.

"Despite the great medical care at numerous facilities, Bobbi Kristina Brown's condition has continued to deteriorate," her aunt Pat Houston said in a statement. "We thank everyone for their support and prayers. She is in God's hands now."

The scenario is harrowingly similar to her mother's death. Houston passed away on the eve of the 2012 Grammys after she was found unresponsive in a bath in a Beverley Hills hotel. A coroner later concluded her death was a result of accidental drowning, though heart disease and cocaine use were contributing factors in her death.

TMZ reported that Brown recently struggled during a Fourth of July celebration concert in Atlanta with his group New Edition.

"I am in a different zone right now," he apologized after forgetting several lyrics during the show. "If I go somewhere else, please join me on the tour because it's gonna be fun."