Zoella back online after news she didn't write Girl Online
Top vlogger Zoella is back on social media after it was revealed that she didn't write the hit book, Girl Online, on her own.
Instead she used something called a ghost writer, which is someone who writes the words based on someone else's ideas.
The book broke the record for the fastest selling debut novel by any UK writer but Zoella has been criticised for not explaining the use of a ghost writer earlier.
After the revelation she told her six million social media followers that she was taking a few days off the internet as "it's clouding up my brain".
Ghost writers are nothing new and many celebrities have had success with books written by them.
Their name doesn't usually appear on the cover but they write most of the book.
In Zoella's case, the YouTube star came up with the characters, while the ghost writer wrote the actual words.
Responding to the criticism on social media, she wrote: "Of course I was going to have help from Penguin's (the book publishers) editorial team in telling my story, which I talked about from the beginning.
"Everyone needs help when they try something new. The story and the characters of Girl Online are mine. I want to thank all of you who have taken time to support the book."