Nicky Byrne has taken to Instagram to share a message with his followers following Caroline Flack's death.
The Westlife star urged people to "think more than twice" before posting a cruel message or comment on social media.
RSVP Live reports he wrote: "I never write these type of posts, however the news of Caroline Flack's passing is utterly devastating.
"No matter who you are or what you do, no matter how positive you always are or as tough and strong you may always seem to be, absolutely NO one is strong enough to completely ignore hate or insults.
"Famous or not, we are all only built to take so much.
"Massive responsibility lies with the writer and sender.
"Think more than twice before you write or post.
"We are all just on our own journeys, our own path through life and making the best of it we can.
"Social media can be amazing, it can also be the most putrid toxic environment.
"We all have a role to play in this. It must change. Be kind.
"What a terrible loss of a talented young woman."
Former Love Island presenter Caroline, 40, was found dead in her London flat yesterday.
Her family's lawyer confirmed she had died by suicide.
An official statement from her family said: "We can confirm that our Caroline passed away today on the 15th February.
"We would ask that the press both respect the privacy of the family at this difficult time."
Caroline had been due to stand trial next month for allegedly assaulting her boyfriend Lewis Burton in December.
Lewis took to Instagram today to share a tribute to her, writing: "My heart is broken we had something so special.
"I am so lost for words, I am in so much pain, I miss you so much. I know you felt safe with me,you always said I don’t think about anything else when I am with you and I was not allowed to be there this time, I kept asking and asking.
"I will be your voice baby I promise, I will ask all the questions you wanted and I will get all the answers, nothing will bring you back but I will try make you proud every day.
"I love you with all my heart."
If you've been affected by the content in this article, you can contact a number of groups, such as AWARE (1800 80 48 48), Pieta House (066 716 3660), and Samaritans (116 123).
