“I am completely devastated, it’s been really, really tough, but speaking to her a lot helps and keeping that contact,” Kimberley expressed.
“She knows we’re there for her every step of the way. She’s a strong girl and I love her so much.”
The Girls Aloud stars have rallied round Sarah since her heartbreaking health struggle.
Kimberley continued to The Sun that she hoped to see her former bandmates watch her latest musical show, Sleepless: A Musical Romance at the Troubadour Wembley Park Theatre.