She's a doting mother-of-three, who spends her days fitting her own schedule around the school run.
But when it comes to a party, Fergie really knows how to let her hair down.
The
singer enjoyed what looked like a wild night as she marked her 40th
with up to 100 pals in the Brentwood neighbourhood of Los Angeles on
Saturday.
Party time: Celebrities like Kelly Osbourne (right) helped Fergie (left) celebrate her 40th birthday on Saturday
Josh
Duhamel hosted the bash - which saw celebrities like Kelly Osbourne,
30, join the Black Eyed Peas star for a 20s-themed Old Hollywood knees
up.
Fergie
set standards high in a white silk dress with a single shoulder strap
and a classic, loose hairstyle for her blonde locks.
The
L.A. Love singer could be spotted in an Instagram Kelly posted after
the party and seemed to have wrapped a fluffy white stole around her
shoulders as well.
Party time! Gifts are carried inside the venue ahead of Saturday's bash
With Kelly looking as though she was seconds away from flashing the camera, the bash was apparently in full-swing at this point.
'Just
had the best night celebrating @fergie's #Birthday she is my
#SisterFromAnotherMr!!!! true friendship is hard to find in this town!'
Kelly wrote as a caption.
While
only apl.de.ap was at the party to represent the Black Eyed Peas - the
others were in London on Saturday - Fergie's party brought the music in
the form of DJ Richie Rich.
Ready to celebrate: Guests dressed in costume for a 20s-themed Old Hollywood knees up
White and red lights decorated the pool-adjacent shindig as the festivities ran into the night.
Josh,
who married Fergie back in 2009, offered a toast to his wife at one
point, 'thanking her for being so amazing,' according to an insider
quoted by Us Weekly.
The happy couple's only child, 18-month-old Axl, likely missed much of the very adult party.
Still
officially 39 until Friday, Fergie has had a busy year with a new Avon
fragrance and putting together her second solo album, due for release
later in 2015.
Loving husband: During the party, Josh Duhamel offered a toast in honour of his wife of six years
