Speculation that Cheryl is ending her marriage to Frenchman Jean-Bernard Fernandez-Versini after less than two years has been intensifying in recent weeks, but neither Cheryl nor JB have made any public comment.
During an appearance on ITV's Loose Women today, Sarah was asked about the divorce rumours and whether she'd been in touch with her Girls Aloud colleague Cheryl.
"I dropped her a text but Cheryl is a strong girl and she will bounce back," said Sarah.
"She always does."
Sarah, 34, added that she'd only met JB once but he'd come across as a nice man. "I met him a couple of years ago on Xtra Factor. He seemed nice enough. I didn't know them that well as a couple but he was always there."
X Factor judge Cheryl surprised fans in July 2014 when she announced she'd wed JB on the Caribbean island of Mustique. It was widely believed they'd met that March in Cannes, but recently it was claimed they'd actually met in South Africa in January.
The couple were both fiercely private of their personal lives and rarely appeared together in public or made reference to each other on social media.
JB did, however, lash out at reports about their marriage in November, saying: "Normally don't read or comment... This is just nonsense. What matters is family and my wife is my only one left so if she need me I am always going to be there. My wife Cheryl is my priority nothing else."