In celebration of the singer expecting her third child with husband Gavin Rossdale, no expense was spared in making sure that her special day was one to remember and it seems like most of Hollywood's elite were in attendance too!
Held at the Hotel Bel Air, Gwen and her A-list pals were treated to a blue-themed bash in honour of her unborn son and munched on doughnuts topped with blue icing, as well as a large cake that was decorated with a sugary newborn baby's head.
The expectant mother looked as stylish as always on the day, wearing a black blazer with statement sleeves, some killer heels and her usual red lipstick.
Meanwhile, actress and mum-of-two Jessica dressed up for the occasion in a cute skirt, which she wore with tights, a leather jacket and a pair of studded, peep-toe shoes.
She also carried a basket of goodies for Gwen and her unborn tot, including various natural items from her home and baby product business, The Honest Company.
Superstar of the big screen, Gywneth Paltrow looked chic for shower in a monochrome ensemble and US talk show host Chelsea Handler was spotted heading into the hotel too, wearing a purple printed outfit and some brown sandals.
Gwen, 44, was clearly overwhelmed by the swanky bash and her many adorable presents - and even that she is still adjusting to being pregnant for a third time.
Thanking her party planner on Instagram, the songstress gushed: "Baby shower!!! #can't believe im pregs thanku Shelli Azoff for a beautiful #girlyday = blessed."
She added: "Lucky girl I am."
Earlier this year, Gwen confirmed that she is pregnant with her third boy via an Instagram photo and joked that she is destined to be the only female in her family.
"I was ready to hand over the crown. but I guess I am still queen of the house. #itsaboy #surroundedbyboys," she wrote.
Gwen and Gavin are already parents to sons Zuma and Kingston.
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Check out which other celebs are expecting babies this year in our gallery below.
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