The daring dresser's huge baby bump took centre stage as the Black Eyed Peas gathered together on Sunday, with her future son looking ready to pop out of the pregnant 38-year-old singer's tight dress.
The excited mother-to-be was joined by fellow founding members will.i.am and apl.de.ap in the celebratory Instragram photo that she posted on Sunday.
Bursting out: Fergie's baby bump was barely restrained by her skin tight dress as she posed with bandmates, will.i.am and apl.de.ap
The pop star and her husband, Josh Duhamel, recently revealed that they are expecting a boy, who is due in September and will be their first child.
Dressed in an extremely figure-hugging pink and black mini, Stacy Ferguson held on to her hips and proudly pushed her bulging bump out even further.
Baby makes five: 'Can¿t forget uncle,' added Fergie as she posted another Instagram photo on Sunday
The little boy's 'uncles' will.i.am and apl.de.ap stood alongside their bandmate, smiling in anticipation of the impending new addition to the group.
Earlier in the day, Fergie had a joint baby celebration with a fellow pregnant friend of hers, saying: 'How cute is this? At @BHardonk & my family #babyshower,' alongside a photo of a delicious chocolate melting cake.
Sweet celebration: Fergie and her pregnant pal had a joint baby shower on Sunday
Family fun: 'Thank u Pam 4 the amazing family #babyshower 4 me & @BHardonk,' tweeted the grateful singer
Among the star-studded guests were Kelly Osbourne, Adam Lambert, Molly Sims and Gabriel Aubry, who all gathered for what the guest of honour jokingly called her 'gayby shower.'
Along with the endless parties, it has been a busy few weeks for Josh and Fergie, who after months of house hunting across Los Angeles have now finally moved into a new Brentwood home.
Ready for baby: Excited parents Josh Duhamel and Fergie celebrated their baby boy at a star-studded shower on July 28 at the SLS Hotel in Beverly Hills
Mandatory Credit: Photo by Startraks Surprise! While they have revealed the sex of the baby, Fergie's son's name is a tightly kept secret
'Yes, I will be getting her a push present. I just don't know quite what yet,' the Safe House star told People.com.
'You got Christmas, you got birthdays, you got Valentine's, you got Mother's Day, you got every other thing in between... I don't know who came up with this push present idea, but I think it's probably a female,' he added.