"Our family has had its share of sorrow these past few years and it is with a heavy heart that I have to once again say 'so long' to a loved one," Warwick, 74, tells PEOPLE. "Bobbi is now sitting in the lap of our Heavenly Father and is now reunited with her beloved mother. She will be missed and I send many thanks for all of the prayers that were being said for her.”
A close family friend also shares heartbreak over the loss of Brown, 22, who died Sunday in an Atlanta-area hospice nearly six months after she was found unresponsive in a bathtub on Jan. 31 in her Roswell, Georgia, home.
"Her passing is a blow from which it is hard to recover. No matter how prepared I thought I was, I am that much more devastated," the source tells PEOPLE.
"Krissi was a young woman whose potential was taken away too soon. A potential that was stymied from seeing the light of day because of circumstances that overshadowed her need to be nurtured," the source adds. "My friend [Houston] has left us, and now, so has a potential part of that legacy. Perhaps being a part of a legacy so great was a burden Krissi was just not equipped to carry ... if anyone would be."
Brown's father, Bobby Brown, broke his silence on Monday over the tragedy.
"Krissy was and is an angel. I am completely numb at this time," the singer, 46, said in a statement released by his lawyer. "My family must find a way to live with her in spirit and honor her memory. Our loss is unimaginable."
Reporting by LIZ McNEIL and PATRICK GOMEZ