The day before she was discovered unresponsive in a bathtub, Bobbi Kristina Brown had been tweeting about her future plans.

AP Copyright: AP

The 22-year-old was trying to launch an acting and singing career, hoping to follow in the footsteps of her world-famous mother, Whitney Houston.

The plans will never be completed now.

The youngster began performing with her mother as early as 1999, singing duets of My Love is Your Love and recording Little Drummer Boy for a holiday album in 2003.

She was taken to hospital twice with anxiety after her mother's death, and rumours circulated about her drug use.

The circumstances of Bobbi Kristina's death are still the subject of a criminal investigation.

Although she was found face down in her bath, the 22-year-old also had bruises on the front of her body.

Her partner, Nick Gordon, says the bruises may have come about when he attempted to resuscitate her using CPR.

Authorities later concluded she had suffered injuries to her face and mouth in a car crash several days earlier, saying it was not the result of foul play.

Reuters Copyright: Reuters

But relations between Gordon and some of Bobbi Kristina's other relatives have soured since she was placed in a medically-induced coma in January.

A protective order barred him from being within 200 feet of Pat Houston, Bobbi Kristina's aunt. And on 24 June, Bobbi Kristina's court-appointed representative sued Gordon, accusing him of misrepresenting his relationship with her.

The complaint accused him of violence and said he "often answered Brown's personal cell phone, would not allow her to make appointments without his approval, and manipulated her bank relationship so that he could access her money".

He also allegedly transferred $11,000 (£7,100) of Bobbi Kristina's funds into an account controlled solely by him while she was in hospital.

Gordon was never charged.

As Bobbi Kristina's health deteriorated last month, US authorities said they would be reviewing the circumstances of her condition "with greater interest".

"An announcement regarding a charging decision, if any, will be made at the appropriate time," Fulton County District Attorney Paul L Howard Jr told People magazine .