YouTube star Zoella's first book has become the fastest-selling debut novel ever.
Girl Online sold more than 78,000 copies in its first week.
Zoella tweeted: "I'm legit blown away by this. I never in a million years thought that so many of you would pick up a copy of Girl Online. Almost want to cry."
She has more than 6.6 million followers on YouTube, where she posts beauty and fashion videos.