Although Nadine, 28, has yet to confirm the identity of her child’s father, rumours have been rife since the announcement that it is former American Football Player Jason.
The former Girls Aloud star and Jason, 35, were pictured, below, flying into London together from LA, which has certainly fuelled the speculation even further.
The couple’s relationship status was unknown at the time Nadine revealed she was pregnant, after they’d been on/off since September 2008.
They got engaged in 2010 but in July 2011 they called the relationship off, with Nadine claiming they were ‘great friends’.
However when Jason to London in March to watch Nadine perform with Girls Aloud, it was suggested the pair were back together.
Nadine’s bump was covered up by the stylish black mac she was wearing but she had a hand placed protectively over her stomach.
The Irish singer chose to reveal her pregnancy in August by posting a picture on Instagram with ‘I’m having a baby’ written across it.
And she shared her excitement earlier this month when she posted a snap of the designer baby clothes she’s already picked out for him/her.
When she first announced her happy news, Nadine received congratulations from all four of her former band mates, with Cheryl Cole tweeting: ‘I just woke up to the news that there is to be a baby aloud!! This is so crazy. But amazing!!