Bobby Brown believes prayers can save his daughter's life.

Bobby Brown

Bobby Brown

The 46-year-old star, who has maintained a vigil at Bobbi Kristina Brown's hospital bedside since she was found unresponsive in a bathtub at her home near Atlanta on January 31, reportedly hasn't given up hope even though the 22-year-old aspiring actress has shown no signs of improvement since being moved to DeKalb Medical earlier this week, which is renowned as the best long-term acute care facility in the area.

The R&B singer is said to be "still leaning on the power of prayer."

And insider also told gossip website TMZ.com that he firmly believes Bobbi Kristina, whose mother is the late Whitney Houston, will regain consciousness.

The starlet's maternal grandmother Cissy Houston, 81, recently admitted she is preparing for the fact that Bobbi Kristina might have to be taken off life support in the future.

Asked about her condition, she said: "She's the same. We've moved her to a place for rehabilitation. And you know, still not a great deal of hope. [We're] still praying.

"I give it to God one time, because I know he's able. And I cannot change a thing. I'm asking everybody: 'Just pray to the Lord who we know CAN do something about it.' If he works a miracle, thank God. If it happens the other way, I'm alright."

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