Marnie Simpson claimed Geordie Shore was 'fake and scripted' in a deleted tweet.
The Geordie Shore regular responded to viewers who had noticed something odd about the show.
Fans were left confused when an episode of this year's series, filmed last year, saw Marnie celebrating her birthday when it actually took place last month.
One viewer tweeted Marnie: "I don't understand how it was @MarnieGShore birthday in the house a couple months ago and it's also marnies birthday today ????"
Marnie replied in a now deleted tweet: "It's coz it's fake and scripted"
A spokesperson for MTV declined to comment.
Meanwhile, it's been claimed Marnie won't be back on the Geordie Shore cast for the next series.
The reality regular joined the MTV show in 2013 but won't be back after the current run ends.
A source told The Sun newspaper: "Marnie has loved her time on Geordie Shore but it's time for her to move on.
"She will still be around for this series but that's it - she won't return for the next."
According to insiders, Marnie is looking to take her career 'to the next level' and already has "loads of exciting opportunities" including new TV shows.
The source added: "She's loved her time on Geordie Shore and it's given her an incredible platform, but now she wants to move on and start new chapter in her life."
Speaking in January, Marnie admitted she found filming Geordie Shore stressful.
“I find it hard to film. I suffer with OCD and anxiety and I get stressed. I want to keep on top of my work outside the house and you can’t do that when you’re filming," she told Star magazine. “Everyone thinks it’s easy but it’s actually really hard.”
Geordie Shore continues Tuesday nights on MTV at 10PM.