She was so grateful and you really lifted her spirits when she needed you most.

I also realize so many will be deeply affected by the circumstances of Sarah’s passing…

I am sending you all so much love.

Girls Aloud

Girls Aloud members Sarah Harding, Nadine Coyle, Nicola Roberts, Cheryl, and Kimberly Walsh.Eamonn McCormack/WireImage

I love you Sarah… “I can’t accept that this day has come.

A part of me or us isn’t here anymore and it’s unthinkable and painful and utterly cruel.

She would have loved your messages today.

Electric girl, you made us.

You gave it everything and still with a smile.

A white butterfly flew past my window this morning before I knew, it must have been you.”

Kimberley Walsh added that she’ll miss hearing Harding’s “infectious chuckle” most of all.

“Your fire burned so bright and you loved, lived and laughed so hard,” Walsh wrote.

“Sending love and strength to everyone who is grieving today.

My heart is broken.”

She also wrote a memoir,Hear Me Out, which published earlier this year.