Shelton began living as a woman in 2012, after successfully undergoing gender transition surgery in 2012.
An announcement which was posted on Rebekah's Twitter page confirmed her death and amassed considerable engagement, with members of the public paying tribute to the former reality TV contestant.
In the video, she explained: "Hi everyone, I just want to kindly ask please stop spreading the rumour that I'm dead".
Big Brother fans will remember Shelton as Rodrigo Lopes, her name during the 2009 series of the reality show before she underwent gender re-assignment.
But Rebekah has now come forward to say her account was hacked and she's very much alive.
'This person can not accept the fact that I am happy, that I've finally overcome my problems.
"I'm on holiday, I'm in Arabia and I am not dead".
"Unfortunately I only knew her as Rodrigo Lopes from @bbuk".
The star appeared on an episode of Judge Rinder in 2016, where she spoke about going through the "worst three years" of her life. "I'm not sure what I would do if I could go back in time".
"I am the happiest I've ever been in myself, but I lost so much along the way", she told OK! magazine at the time. It's a hard decision, because you have to face yourself.
Of transitioning, she said: "It's hard, nobody will choose to go through the hardest path".
"At first you have to face yourself as it's not easy to be a different person, or what's considered different". I spent a month in hospital in intensive care and I didn't get any calls from my family or anything.
'He saw me as a woman, the person I am. I started crying in the corridor saying, "I regret it, I regret it".
Another replied to the message and said they would remember her as "one of the most loveable BB housemates".
'So many times I wanted to kill myself because I had no one to talk to'.