Nicola Roberts has 'snubbed' Sarah Harding's Celebrity Big Brother appearance.
The Girls Aloud star was asked if she had been watching the show and about Sarah this week but refused to comment.
Chatting to The Sun newspaper, Nicola replied when quizzed on Sarah on CBB: "I don't want to talk about that".
It comes as Nicola and Sarah's fellow bandmate Nadine Coyle spoke up to defend Sarah.
"Inside info on Sarah, she is a very natural being. She dwells on of her feelings & acts on them. It is what makes her so unique," Nadine tweeted.
She added: "Those of us who know & love her know that. The support from you guys will mean the world to her!! Xx
"If I was there, no one would DARE utter a bad word to her!!!!! Xx"
During her time in the house, Sarah has spoken regularly about her time in Girls Aloud and the lack of contact with Nicola, Cheryl and Kimberley Walsh.
In last night's show, Sarah and Amelia Lily were talking in the bathroom while doing their hair when Amelia brought up the topic of Cheryl: “She’s quite private isn’t she Cheryl.”
Sarah responded “She tries to be. She just knows how to work it when she wants to, when she wants to be seen she is, and when she doesn’t, she makes sure she isn’t. like with the whole baby thing. She just plans things meticulously.”
Amelia commented “clever lady”, to which Sarah said “She’s savvy, I’d give her that.”
Sarah later spoke to Big Brother in the diary room about her lack of confidence since leaving the band.
She opened up candidly: "I am such a fun loving person when I have the right people around me but I'm also really sensitive and my confidence was severely knocked over the last five, six years since the band ended.
"No one really tells you what to do when you've been up for a majority of years. You've had a lot of crazy life changing scenarios happen and then all of a sudden, it's gone"
Sarah reflected on her time in the girl group: "I hugely underestimated how big we were when we were, because we were in a bubble. I do miss them. I do miss but we're all grown up now.
"Most of them are getting married and having kids, which is what I want to."
Celebrity Big Brother 2017 airs tonight at 9PM on Channel 5.