Grahame, originally from Northwood in London, had recently received treatment for an eating disorder at a specialist clinic following a fundraising campaign organised by friends and fans.
A statement on the http://Gofundme.com  page said: “It is with great sadness, we have to let you know that our dear friend Nikki passed away in the early hours of Friday 9th April.
“It breaks our hearts to know that someone who is so precious was taken from us at such a young age. Nikki not only touched the lives of millions of people, but also her friends and family who will miss her immensely.”
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