It was indeed a Fergalicious affair!
On Saturday, Fergie celebrated her 40th birthday with 100 of her closest friends and family at her pimped-out crib in Brentwood!
[ Related: Josh Duhamel's Six Pack Abs Have Our Attention! ]
Guests including Black Eyed Peas bandmate apl.de.ap and galpal Kelly Osbourne enjoyed the shindig's Old Hollywood theme, and danced the night away to tunes spun by DJ Richie Rich!
In fact, the former Fashion Police host snapped a photo of the bday girl — who wore a gorgeous white silk one-shoulder gown — on her Instagram and added the caption:
"Just had the best night celebrating @fergie's #Birthdayshe is my #SisterFromAnotherMr!!!! true friendship is hard to find in this town!"
The beautiful evening was topped off with a berry cream cake from Sweet Lady Jane Bakery, Ferguson wine, — a brand started by the singer and her father John Patrick Ferguson — and a toast from husband Josh Duhamel!
According to an insider, the hunky 42-year-old gave a touching speech where he was:
"thanking her for being so amazing and having a boy for them too."
Overall, the eyewitness revealed:
"Her 40th seemed perfect."
We're so glad Fergie had a wonderful birthday, and we know she has many more great years to come!
[Image via Kelly Osbourne/Instagram.]
Tags: beautiful, birthday, black eyed peas, brentwood, dj, family, fashion, fashion police, fergie, friends, hollywood, husband, instagram, josh duhamel, kelly osbourne