Rock bottom: Nicole Scherzinger shows off her pert behind as she parties following dramatic X Factor sing-off

PUBLISHED: 08:15, 11 November 2013 | UPDATED: 15:10, 11 November 2013

She may have lost an act in Sunday night's X Factor, but that didn't stop Nicole Scherzinger from partying.

The singer and talent show judge was spotted at The Arts Club in London's Dover Street, Mayfair, following a dramatic episode of the ITV series.

Only hours earlier she had lost one of her star acts - Abi Alton - in a tense, emotional sing-off with Hannah Barratt.

Nicole Scherzinger seen leaving the Arts Club in London in London after an emotional episode of the X Factor

Bum note: The former Pussycat Doll clearly wasn't shy about posing for cameras as she got in her car

Nicole Scherzinger seen leaving the Arts Club in London. The X-Factor judge looked radiant as she made her way to an awaiting vehicle

Rearly great to see you: Nicole laughs and jokes as she risks appearing unlady-like in Dover Street

Wearing a stunning black catsuit, the 35 year-old star - who first found fame in the Pussycat Dolls - wowed onlookers with her sophisticated style.

She delicately accessorised the look with nude heels and a rainbow-effect ring, which covered three fingers on her left hand. Her brown hair was left to free-fall in a cascade of soft waves.

And as she climbed in the car she showed off her pert dancer's rear while seemingly holding the pose for photographers.

Bling ring: The X Factor judge wore an unusual rainbow-effect ring with her satin catsuit

Fortunately, she had bigger things to worry about.

It was an evening of mixed results for Sunday's Big Band Night – as Hannah Barrett and Abi Alton faced each other in the sing off.

Abi was first up with a piano led version of Ed Sheeran hit Lego House, turning in what appeared to be her finest performance of the series.

The singer looked svelte and stylish as she left the private club, where she was seen partying

Don't you wish your girlfriend was hot like me? Catty women everywhere would've bristled at the Pussycat Doll

It was a difficult performance to match but Croydon-based Hannah gave it her very best with a performance of Wrecking Ball by Miley Cyrus.

Eventually, Abi was sent home.

The supermarket worker received a rapturous round of applause that prompted her to burst into tears as she exited the stage, where she was given a warm embrace from the waiting Hannah.

Abi Alton, accompanied by Hannah Barrett, breaks down with her best Claire Danes face after being eliminated from the show

The teenager was distraught, but she was assured by Dermot that she would ‘never have to work in a supermarket again’ as Nicole joined her on stage.

‘I’ve had the time of my life,’ she said. ‘I’ve met the most amazing people. I would never change it.’

Consoled: Abi Alton is distraught as she is given the news that she has been voted off by Dermot O'Leary

But it hasn't all been bad news for Nicole.

X Factor bosses praised the star's behaviour by asking fellow judges Gary Barlow, Louis Walsh and Sharon Osbourne to act more like her.

The judges were asked to 'raise their game' and get more involved with their acts, which has reportedly heated up the rivalry between them on the show.

This comes as recent Saturday night ratings show Strictly Come Dancing had topped the leader board once more with 10.3 million viewers compared to The X Factor's 8.22m.