The new parents, who welcomed their baby boy just six weeks ago on 29 August, didn't let their little bundle of joy stop them from helping out on harvest day.
The Black Eyed Peas singer got involved in the harvest at her family's Santa Barbara winery, near Los Angeles, taking to Twitter to share various family snaps.
In one of the photographs, baby Axl Jack is snuggled up in a purple blanket, held by his beaming grandfather in the shade of the vines. A small bunch of grapes had been strategically positioned on the six-week-old's blanket for added effect.
"Grampas favorite bundle of grapes in the vineyard," wrote the delighted new mum.
Another picture shows Fergie showing off the fruits of the day’s labour, pouting for the camera in front of tubs oozing with grapes. "Oooooh juicy grapes," she captioned the image.
The star holds up bunches of red grapes in yet another snap while actor husband Josh, 40, who's donned a white Ferguson cap to shield his eyes from the sun, looks hard at work.
The 38-year-old singer founded the vineyard in 2006, along with her father, Pat.
The duo launched their wine label, Ferguson Crest – which boasts several types of wine including a syrah, a cabernet and two viogniers – six years later, on 24 September, 2012.
There is also a blend named after pop dynamo Fergie herself, named Fergalicious.