Paris Reacts to Casey Johnson's Death

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Another heiress has spoken up about the shocking death of Casey Johnson. Paris Hilton took to her Twitter to express her sadness over the news. The two were childhood friends, and Casey was even the original pick to co-star in The Simple Life with Paris.

She wrote, "In bed crying, looking at baby pictures of Casey, Nicky and I. I feel so upset. I feel like I've lost a sister. My heart is broken. Miss her."

A little while later, Paris added, "God has another Angel by his side. Casey, we all Love and Miss you and know that you are in a better place. R.I.P"

Paris also talked with Life & Style magazine, saying, "I am devastated to hear this news. I've known Casey since I was a baby. She had a big heart and she was a good friend. I feel so sad; I don't want to believe it. My condolences go out to her family and loved ones."

Nicky Hilton is even the godmother to Casey's adopted daughter, Ava. The Johnson family has released a statement saying it "is mourning its tragic loss, and asks for privacy during this very difficult time."

Though no cause of death has been released as of yet, we’ve learned this morning that Casey fell into a diabetic coma twice and had to be hospitalized.

Police tell TMZ that Johnson had a history of diabetes and insulin syringes were found in her home after she died. Details to come…