She said before she entered: "I don't know what she'd be anxious about, but at the end of the day, if I went in there I wouldn't talk about the band or any of my exploits".
Chad Johnson and Amelia Lily may have at one point looked like they could kick off a romance in the Celebrity Big Brother house, but all that has come to a screeching halt when the former star of The Bachelorette told the singing sensation exactly how he felt about her. "She's so fake. How many times can someone complain about a headache?"
While Sarah was upset enough at those remarks, things got even worse when Jemma suggested Sarah was the reason Amelia couldn't celebrate not being nominated.
Meanwhile, Sarah wasn't feeling so positive about Paul either, telling Amelia Lily, 22, in private: "I think he's playing games with people's minds a little bit".
That prompts Jemma to comment: "Amelia, you are not up for the first eviction. You should be buzzing but you feel like you can't because you've got to look after that..." I don't know - it's nothing to do with me.
Speaking to her CBB housemate Jemma Lucy in the episode of the reality TV show which airs tonight, Sarah, 35, said: "I'm only 5'5'".
We're only three days into CBB, but Sarah's already been reminded of her Girls Aloud past.
She sobbed: "I just can't deal with them".
Someone else admitted to being surprised at how good Harding's voice sounded when isolated from the rest of her group. "That's why he's shaved", Harding told the USA reality star.
Later in the kitchen, Paul tries to make amends: "Sarah, I apologise if I upset you or hurt you".
Hitting back, Sarah retorted: "Stop acting psycho, Paul". You're a hypocrite and you're a snide'.
The Girls Aloud singer is seen sobbing in the Celebrity Big Brother diary room after Jemma and Paul called her actions attention seeking in tonight's episode on Channel 5.