The former Girls Aloud star was grinning from ear to ear as she left the Nordoff Robbins Boxing Dinner at the Lancaster Hotel on Monday evening (7 October).
Nadine looked fabulous, keeping her baby bump covered with a loose white shirt and white blazer, teamed with black leggings and black heels.
The 28-year-old posed for cameras outside the venue and then spent time taking pictures with fans who had been waiting for her.
Nadine jetted into London from her adopted hometown of Los Angeles at the end of September, giving us the first look at her growing baby bump.
After landing, she tweeted: "I feel great thank you! So so happy to be back in London. It feels all cozy & I am getting totally spoiled."
The 'Love Machine' singer was accompanied by former fiancé Jason Bell, leading many to speculate if he is the father of her child.
She has not publicly confirmed the dad's identity yet.
Nadine surprised us all when she announced her pregnancy in mid-August by uploading an Instagram picture of herself with the caption: "I'm having a baby x."
So far she hasn't released any other information, such as a due date or whether she knows the sex of the baby.
Take a trip down memory lane with Nadine's video for 'Insatiable' below:
More pregnant celebrities in our gallery below!
Copyright: Vimeo / Weiss Eubanks