The 44-year-old Spice Girl, who is expecting her second child, shared an adorable pregnancy pic on Instagram on Wednesday.
"In the studio," Halliwell captioned the black-and-white snapshot of herself in a recording studio.
The British singer announced the pregnancy on Monday, hours before debuting her bump on the red carpet for the Attitude Awards at London's Trafalgar Square.
During the ceremony, Halliwell was presented with an award from fellow Spice Girl, Emma "Baby Spice" Bunton.
The mom-to-be posted a pic from the friends' "amazing night" out on Instagram. "She presented me my @attitude award," Halliwell captioned a sweet photo of Bunton's hands on her hands baby bump. "Felt so good to share the joy. #mamaspice."
The pregnancy pics didn't stop there. Bunton Instagrammed a photo with Halliwell as well, which she captioned, "Congratulations to my gorgeous friend @therealgerihalliwell Another #SpiceBaby on the way!"
Halliwell's upcoming bundle of joy will be Halliwell's first child with husband Christian Horner
. The pop star has a 10-year-old daughter named Bluebell, from a previous relationship.
With a new baby on the way, Halliwell is in a much happier space than her Spice Girls days. She recently opened up about battling bulimia on the OWN show Oprah: Where Are They Now?
"I felt much more conscious of myself, my body weight," explained Halliwell. "We all used different tools to get by, coping mechanisms. For me [it] was controlling my body weight."
See more in the video below.