Yes, Cheryl confirmed on instagram this girl was lying, her PR also confirmed it.
Sarah has done a TV interview last week and she talked about being in contact with Cheryl, texting each other and probably meeting the both of them in LA soon... she's with the only Girls Aloud member Sarah has interacted on twitter since the split.
This was from just a couple of weeks ago
https://twitter.com/SarahNHarding/st...65410539741185
That's for the people saying they aren't friends and it's Cheryl/Nicola/Kimberley and Sarah/Nadine when, by Sarah's words, it's totally untrue and she's in contact more with Cheryl than with Nadine.