Sarah Harding says Nadine Coyle is ''sick'' of being pregnant.

The 'Insatiable' singer is expecting her first child with Jason Bell and her former Girls Aloud bandmate alleges the brunette beauty is exhausted.

She told the Daily Mirror newspaper: ''Nadine's getting sick of it! I know she's knackered.''

Sarah and Nadine have been in touch since the band - who called it quits just hours after they performed the final date of their reunion UK tour in Liverpool in March - split and the blonde beauty says Nadine is currently busy preparing for the festive season.

She said: ''We were texting last Saturday. She's putting up the Christmas tree and nesting. She's due in February so she's getting ready.''

Sarah - who is dating producer Mark Foster - previously admitted she found Nadine's pregnancy ''weird'' when news broke as did Cheryl Cole.

Sarah said: ''Who's have thought she'd have been the first one of us all to get pregnant. Me and Cheryl were like, 'Oh my God, can you believe it?' It is good, though I couldn't believe it when I saw those pictures! She's actually got a bump. I thought, 'This is weird'.''