WHITNEY HOUSTON'S daughter BOBBI KRISTINA had a last-minute diva meltdown and refused to appear on a British reality show when they asked her to dish the dirt on her mom.

The 20-year-old was reportedly signed up for a whopping $400,000 payday on “Celebrity Big Brother,” which premiered Aug. 22 and follows the antics of well-known entertainers and personalities living together in one house.

Bobbi Kristina was on board until the producers told her they expected her to talk about her drug-plagued mother’s death.

Bobbi Kristina, called Krissy by her family, was so enraged she burst into tears, said an insider. “Krissy yelled at them, ‘Do you want a picture of her naked dead body lying on the hotel’s bathroom floor too?’

“She said she’s trying to move on with her life, and she stormed off.”

Krissy still misses her mother terribly. The singer’s sudden death in Las Vegas on Feb. 11, 2012, shocked the nation.

Whitney’s daughter, herself allegedly plagued by drug problems, was set to join the British show along with 12 others. Participants are isolated from the outside world for three weeks, while cameras capture their behavior. While there, they compete in various contests as participants get voted out of the house until one winner is left.

But Krissy, whose beloved mom would have turned 50 on Aug. 9, has voted herself out of “Big Brother,” said the source.

“She has her own showbiz aspirations, but this project didn’t seem right for her. She told the producers she wants nothing to do with them.”