04/30/2015 03:45 pm ET Updated Apr 30, 2015

Cissy Houston 'Will Fight To The Grave' For Bobbi Kristina's Estate

Dan Hallman/Invision/AP

The drama between Bobbi Kristina Brown’s grandmother, Cissy Houston, and her father Bobby Brown, is said to be getting ugly as she reportedly plans to challenge him after he filed to be the head of her estate.

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