The singer, who joined forces with pal Ollie Marland to work on music together as Lost & Found, continued: “We decided, after a lot of thought, that rather than hiding away and trying to keep it a secret, we would do one interview where we could lay out all the details and let everyone know the facts in our own way.
“We are all absolutely devastated but we are gonna fight this all the way.
“We don’t want your sadness, we just want love and positivity and together we will raise awareness of this terrible disease and look for all available treatment options.”
Kelsey joins celebrities including actress Gemma Oaten, Cel Spellman and Dr Alex George as ambassadors for The Diana Award’s Don’t Face It Alone campaign.
Explaining her initial reaction to being asked to front the campaign, Kelsey added: “I was really overwhelmed when they asked me to be an ambassador because, you know, Diana is a massive name, a massive legacy, and what she stood for is what I stand for.
“It’s just an honour to actually be involved in this charity and like I said I work so closely with young children – I just want to help as much as I can.”
The Diana Award ‘Don’t Face It Alone’ campaign launched last week. For more information and to download resources visit www.dontfaceitalone.com