The 28-year-old singer proudly showed off her baby's burgeoning wardrobe on Instagram and Twitter, while sharing her elation with her followers.
"Baby's beginner wardrobe. It feels like a dream, a really great dream I don't want to way up from," Nadine wrote next to a photo of some of her first purchases for her unborn child.
In the picture, a selection of tiny clothes by the likes of Dior can been seen hanging in a wardrobe, including a number of babygros and a luxurious blanket.
If Nadine has found out the sex of her firstborn, she wasn't giving the game away. The all-white collection perhaps suggests that the mum-to-be has decided to keep the baby's gender a surprise.
Nadine announced her pregnancy in August, but has so far not revealed the identity of the baby's father. She shared her happy news by posting a picture of herself on Instagram with the caption, "I'm having a baby" written across the image.
Although the Northern Irish singer has not commented, it is rumoured that the child's daddy is her on/off boyfriend and former fiancé Jason Bell, with who she reportedly reconciled earlier this year.
Nadine dated the retired American footballer, 35, for three years before their split in June 2011. But in March of the year, he flew over to the UK to watch her perform at London's O2 arena with her Girls Aloud bandmates, Cheryl Cole, Sarah Harding, Kimberley Walsh and Nicola Roberts.
The girls were among the first to offer their congratulations to the star following her pregnancy announcement, with Cheryl taking to Twitter to share her excitement.
"I just woke up to the news that there is to be a baby aloud!!" she wrote. "This is so crazy. But amazing!!"
She later added, "Congratulations @nadinecoylenow. Can't believe you're going to be a mummy!!!!!!!"