Sher-tipsy? Braless Nicole Scherzinger puts on a busty display in a rock chic ensemble at Kelly Osbourne's 32nd birthday bash in London

She's was busy watching her X Factor acts perform just hours earlier. 

But Nicole Scherzinger didn't let her busy schedule get in the way of a good party as she attended Kelly Osbourne's 32nd birthday party in London on Saturday night. 

The 38-year-old former Pussycat Doll showed off her bountiful curves in a rocker-inspired outfit as she left Mayfair's The Arts Club alongside the birthday girl and her X Factor panel pals Sharon Osbourne and Louis Walsh.

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Party time! Nicole Scherzinger didn't let her busy schedule get in the way of a good party, as she attended Kelly Osbourne's 32nd birthday party in London on Saturday night

Party time! Nicole Scherzinger didn't let her busy schedule get in the way of a good party, as she attended Kelly Osbourne's 32nd birthday party in London on Saturday night

Going braless in a plunging black bodysuit, the judge put on a busty display.

And wearing a pair of leather-effect trousers over it, she showed off her toned thighs.

Weaving purple extensions into her halo braid, the raven-haired beauty channelled rock chic.

And matching her jacket to her trousers she braved the cool autumnal chill. 

Work do! The 38-year-old former Pussycat Doll showed off her bountiful curves in a rocker-inspired outfit she left Mayfair's The Arts Club alongside the birthday girl and her X Factor panel pals Sharon Osbourne and Louis Walsh

Work do! The 38-year-old former Pussycat Doll showed off her bountiful curves in a rocker-inspired outfit she left Mayfair's The Arts Club alongside the birthday girl and her X Factor panel pals Sharon Osbourne and Louis Walsh

Racy! Going braless in a plunging black bodysuit, the judge put on a busty display

Racy! Going braless in a plunging black bodysuit, the judge put on a busty display

Despite the presumably heavy night of partying, Nicole's make-up was in an impressively good condition.

Opting for bold cat eye eyliner with a touch of Halloween-inspired silver glitter, the Hawaiian-born beauty accentuated her pretty peepers.

And paying attention to detail the star matched her glitzy multi-strap bangle to her intricate drop earrings.

Hell for leather! Weaving purple extensions into her halo braid, the raven-haired beauty channelled rock chic

Gym bunny! And wearing a pair of leather-effect trousers over it, she showed off her toned thighs

Feeling nippy? And matching her jacket to her trousers she braved the cool autumnal chill

Feeling nippy? And matching her jacket to her trousers she braved the cool autumnal chill

In the true Halloween spirit, she opted for vampy burgundy nails and a Gothic black pedicure, complemented by her strappy black sandals. 

Adding nude lipstick and a dash of highlighter, the Don't Hold Your Breath star's outfit was complete.

And Nicole looked like she had a whale of a time, blowing kisses at the photographers as she left before having a good chinwag with the birthday girl. 

Merry: Nicole looked like she had a whale of a time having a good chinwag with the birthday girl
Fan love: She blew kisses at the photographers as she left before

Merry: Nicole looked like she had a whale of a time, blowing kisses at the photographers as she left before having a good chinwag with the birthday girl

Attention to detail: In the true Halloween spirit, she opted for vampy burgundy nails and a Gothic black pedicure, complemented by her strappy black sandals

Attention to detail: In the true Halloween spirit, she opted for vampy burgundy nails and a Gothic black pedicure, complemented by her strappy black sandals

Kelly donned a floor-length polka-dot dress, teaming it with a blazer and a top hat.

Flaunting her quirky style she had the sides of her head shaved low with a just a tuft of lilac hair peeking out beneath her hat. 

Rocking a bold red lip and drop earrings, she giggled with Nicole as she left the venue. 

Quirky: Kelly donned a floor-length polka-dot dress, teaming it with a blazer and a top hat

Quirky: Kelly donned a floor-length polka-dot dress, teaming it with a blazer and a top hat

Ready for bed: Nicole arrived back at her hotel at 3:30am
Flawless: Despite the heavy night the star's make-up stayed in tact

Ready for bed: Nicole arrived back at her hotel at 3:30am

Proud mum Sharon, 64, was also in attendance looking ever youthful.

With her trademark flame-coloured hair, she rocked a more tame floral-inspired ensemble. 

And X Factor top dog Simon Cowell also put in an appearance with partner Lauren Silverman.

The judges will be back on the panel on Sunday night- perhaps suffering a little hangover, as they watch their acts sing for their places in the show. 

Need a hand? Nicole looked like she may have a struggle on her hands to undo her hairstyle

Need a hand? Nicole looked like she may have a struggle on her hands to undo her hairstyle

X Factor top dog: Simon Cowell also put in an appearance with partner Lauren Silverman

X Factor top dog: Simon Cowell also put in an appearance with partner Lauren Silverman

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