Fears that ghouls will plunder her resting place were triggered after it was revealed she was buried wearing up to £300,000 of jewels and designer clothes.
The singer, who died a fortnight ago in her LA hotel room after a drugs and booze binge, lies in a gold-lined coffin worth tens of thousands of pounds.
She is draped in a purple gown and also wears a diamond brooch and earrings and a pair of glittering gold slippers.
But the treasure-filled casket has caused alarm among the star’s family and friends.
And now minders have been ordered to watch over her grave-side at Fairview Cemetery in Newark, New Jersey.
A source said last night: “There is a very genuine fear that her coffin will be targeted by grave robbers.
“It would be hard for them to actually dig her casket up, but that won’t stop psychotic fans or people who think it could make them money.
“The fact she was buried with such valuable jewellery is just an invitation to sickos.
“It’s ironic that Whitney, who was most famous for The Bodyguard movie when she was alive, has to have bodyguards even in death.”
Armed security men around Whitney’s final resting place have already turned away busloads of fans who have made “pilgrimages” to her grave.
The ghoul alert is the second trauma that Whitney’s family have faced over the past 48 hours.
They are still reeling after shocking photos of her body lying in an open coffin were published in the US magazine National Enquirer.
Aretha Franklin and Stevie Wonder are set to perform musical tributes to Whitney Houston during her funeral in New Jersey on Saturday.
We’re also told Oprah Winfrey has been invited to the private service at the New Hope Baptist Church in Newark, and that Kevin Costner will speak about his co-star from The Bodyguard.
Houston’s musical mentor Clive Davis is confirmed to speak, and gospel singer Marvin Winans is slated to eulogize his longtime friend.
Despite reports elsewhere, Houston’s ex-husband Bobby Brown will be in attendance at the funeral.
Whitney Houston’s funeral will be held in Newark, N.J., later this week, NBC New York has learned.
Houston’s body is expected to be flown to New Jersey as early as Monday evening, depending on arrangements in Los Angeles, according to sources working with the family. She was found dead in a hotel room there on Saturday.
Whigham Funeral Home is handling the funeral.
Houston was born in Newark and raised in East Orange. She got her start as a singer in the choir at New Hope Baptist Church in Newark.
Many said she never forgot her Jersey roots.
Her mother, Grammy award-winning gospel singer Cissy Houston, led the musical program at the 112-year-old church. Whitney’s cousin, singer Dionne Warwick, also sang in its choir.
Mourners have been flocking to the church since the news of her death on Saturday.
“The Houston family means a lot to this community, they have done a lot for this community, and being there for them is the best thing we can do as a community today,” said Shawn Cooper, 32, as he left an early morning service at the church on Sunday.