"It was a little scary to get into a coffin, and I took some pictures and they didn't know I was doing it and I sent it to them from my phone — to the whole family — and they were like, 'What is going on!'" she said.
"I was like, 'Never send me anything like that again! That's disgusting,'" sister Khloe added. "She's like, 'It was for charity!'"
Other celebrities who have "died" for the cause include Ryan Seacrest, Lady Gaga, Alicia Keys, and Serena Williams.