Johnson, 30, was openly gay and was reported to be engaged to model and TV personality Tila Tequila.
Gossip website TMZ originally reported Johnson had died.Tequila posted a Twitter message at 12:40pm (AEDT) saying: "Everyone please pray 4 my Wifey Casey Johnson. She has passed away. Thank u for all ur love and support but I will be offline to be w family"
"This is a very heartbreaking time for me. I just want some pricacy (sic) as I deal with the loss of my Fiance Casey Johnson. I'm heart is shredded."
Tequila later updated the site with the tweet: "I just got news that my fiance is not dead but currently in a coma!!! Omg please pray that she will make it! Hang in there my love please!!!"
"I know u can feel me Casey! Dot let go! I'm almost home baby please hang on! We have a beautiful life planned out for us! I LOVE u! Hang on!"
The heiress’ Twitter page was last updated December 29, the same day Tequila told TMZ she lost contact with Johnson after a fight. Johnson’s phone had been turned off since the 29th.
