Stars including Davina McCall and Calum Best have paid tribute to TV presenter and YouTuber Emily Hartridge who has been killed in a crash in south London.
She is believed to be the victim of a crash involving an electric scooter and lorry in Battersea on Friday.
A tribute on the 35-year-old's Instagram page described her as someone who "touched so many lives".
She had more than 340,000 YouTube subscribers to her channel and a big presence on Twitter and Instagram.
Her channel offered health and lifestyle advice, and she founded the YouTube show '10 Reasons Why'. She had interviewed A-listers such as Hugh Jackman and Eddie Redmayne.
Hartridge had also fronted a 4OD documentary on turning 30.
A statement on Hartridge's Instagram page said: "Emily was involved in an accident yesterday and passed away.
"We all loved her to bits and she will never be forgotten."
McCall said in a response to the post on Instagram announcing the death: "My heart goes out to Emily's family and friends. Such a shock. Sending you love and prayers."
Best wrote that it was "so sad and he was so sorry".
Months prior to her death she had told The Sun of her decision to freeze her eggs and hopes of becoming a mum.
On Thursday she had shared a video of herself with a boyfriend on Instagram.
'Funny and kind'
A biography on the website of Insanity Group, her management agency, reveals she had a "huge interest in mental health and fitness".
"Following a very difficult period, she turned her life around," the bio said.
"One of the positive outcomes of her breakdown" was that it became her "mission to remove the stigma surrounding anxiety and depression", it added.
TV historian Greg Jenner tweeted he was "deeply saddened" by the death.
"I met @emilyhartridge on a train 5 years ago, and by the end of the journey we'd shared all sorts of things about our mental health and insomnia," he said.
"She was funny, kind, and open-hearted."