'WHAM-azing!' Flirty Nicole Scherzinger shakes her bust in excitement at Matt Terry's rendition of I'm Your Man during X Factor's Boybands vs Girlbands week 

Saturday night's live X Factor show was kicked off in style by the judges, who were introduced as members of the Spice Girls.

Sharon Osbourne was Mama Spice, Simon Cowell claimed the title Moneybag Spice, while Nicole Scherzinger sizzled as Pussycat Spice and Louis Walsh was left red-faced when Dermot O'Leary introduced him as Old Spice.  

The theme this week was Boybands versus Girlbands, with classics from the Spice Girls, One Direction and even Wham!, and Nicole got so excited by Matt's 'wham-azing' rendition of I'm Your Man that she performed a very busty dance.

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Red hot! Saturday night's live X Factor show was themed on Boybands versus Girlbands and Nicole got so excited by Matt's 'whamazing' performance of I'm Your Man, she performed a very busty dance

'Whammy, whammy, whamazing':  Nicole said of the performance, shaking her chest excitedly

Matt Terry kicked off the show with Wham! classic I'm Your Man, getting the audience clapping with the upbeat hit. 

Surrounded by a bevy of beauties on stage, the Louis Tomlinson lookalike admitted not being used to all the female attention he's been garnering.

While Louis branded his performance 'karaoke', his performance went down better with Sharon and Simon.

'Did that get your pulse racing,' Dermot asked X Factor favourite Matt, referring to the song rather than Nicole's racy display

Seductive: Nicole sent pulses in the studio racing with her daring dance

'You didn't take yourself too seriously, I loved it,' Simon said. 

'This was the first time Louis hasn't liked the words 'I'm your man', he added in a jokey dig towards Louis.

'Whammy, whammy, whamazing', Nicole branded the performance, shaking her chest excitedly.

'Did that get your pulse racing,' Dermot asked X Factor favourite Matt, referring to the song rather than Nicole's racy display. 

Joking about Simon's reported recent dig at members of 1D for 'not staying loyal' to his record label, Dermot introduced Simon with: 'He could claim to be the genius behind One Direction, here's his act Sam Lavery'.

Oops! Sharon Osbourne was Mama Spice, Simon Cowell claimed the title Moneybag Spice, while Nicole Scherzinger sizzled as Pussycat Spice and Louis Walsh was left red-faced when Dermot O'Leary introduced him as Old Spice

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Sending pulses racing: Matt Terry kicked off the show with Wham! classic I'm Your Man, getting the audience clapping with the upbeat hit

'You didn't take yourself too seriously, I loved it,' Simon said of his performance

Singing Girl's Aloud, Sam gave an emotional performance of 'I'll Stand By You'. 

Despite admitting she wasn't confident about the choice, she dedicated it to her father who she admitted was feeling melancholy about her 'flying the nest'. 

Coming to the end of her performance the 17-year-old singer got teary, explaining that it's the 'first song she connected to'.

However Nicole wasn't as impressed as the other judges, adding that she felt the song 'aged her'. 

Connecting with the song: Singing Girl's Aloud, Sam gave an emotional performance of 'I'll Stand By You'

Feeling the pressure: Coming to the end of her performance the 17-year-old singer got teary, explaining that it's the 'first song she connected to'

The next acts to grace viewers was Honey G, who sung Jump by Kris Kross, apparently inspired by watching them in concert aged 13.

'I grew up with some people saying I wouldn't make it', she moaned unconvincingly, before kicking off her performance clad in a blinding silver metallic jacket and her trademark cap and sunglasses. 

Despite her questionable performance, the panel seemed impressed with Nicole getting up and dancing as Honey G attempted a routine, surrounded by a group of dancers.

Still going: The next acts to grace viewers was Honey G, who sung Jump by Kris Kross, apparently inspired by them when she watched them in concert aged 13

Her story: 'I grew up with some people saying I wouldn't make it', Honey G said of her success

'You smashed it!' Louis screeched, 'best performance so far', he concluded worryingly. 

'On paper this shouldn't work and every week I keep thinking it's going to end..' Simon gushed, adding, 'backstage you're one of the nicest contestants we've ever had'. 

'I'm taking this all the way', Honey shouted, bopping off-stage happily. 

Next Ryan Lawrie performed, after admitting he was hurt by the response from the public after staying in the competition while Gifty Louise was eliminated last week.

Proving himself: Next Ryan Lawrie performed, after admitting he was hurt by the response from the public after he was chosen over Gifty Louise last week

Energetic: Singing Twist and Shout by legendary band The Beatles, Ryan put on an energetic performance, getting the audience on their feet

Singing Twist and Shout by legendary band The Beatles, Ryan put on an energetic performance, getting the audience on their feet.

'I didn't love the song but I love the attitude and you've come back fighting!', Louis proclaimed. 

Sharon branded the performance as 'not enthusiastic enough', to boos of the crowd, but Simon disagreed, explaining: 'You gave that everything, and it's been good for you to be in the bottom two'. 

Next 4 Of Diamonds were up, revealing the Twitter backlash they received after they were kept over Gifty Louise was hard.

Hurt: Next 4 Of Diamonds were up, revealing the Twitter backlash they received after they were kept over Gifty Louise was hard

Comeback: The foursome sung a harmonious rendition of Wilson Phillips' Hold On, with Simon branding it their 'best live performance'.

The foursome sung a harmonious rendition of Wilson Phillips' Hold On, with Simon branding it their 'best live performance'.

Saara Aalto was up next, singing Girls Aloud's Sound of The Underground. 

Putting on a dramatic Geisha inspired set, the Finnish singer boasted an impressive vocal performance, adapting the song to her own quirky style.

Standing out: Putting on a dramatic Geisha inspired-performance, the Finnish singer boasted an impressive vocal performance, adapting the song to her own quirky style

'It was fantastically nuts but don't become the choreographer's puppet', Simon warned

'I want you to get a record deal!' Louis shouted excitedly, with Nicole branding her performance 'epic'. 

'It was fantastically nuts but don't become the choreographer's puppet', Simon warned. 

A barefoot Emily Middlemas sung One Direction's What Makes You Beautiful, adapting it to her soft soulful voice.

'You are the future, you do not know how good you are, you could sell a lot of records and I think we've found a star,' Louis proclaimed. 

Talent: A barefoot Emily Middlemas sung One Direction's What Makes You Beautiful, adapting it to her soft soulful voice

'You are the future, you do not know how good you are, you could sell a lot of records and I think we've found a star,' Louis proclaimed

Nicole branded her 'the voice of an angel', complimenting the production along with Sharon. 

'We have eight people left and halfway through the competition and you've created a unique recognisable and distinguished style and you've just got it right', Simon concluded. 

Closing the show was Five After Midnight with the Spice Girls' Say You'll Be there-their third song choice which took them a day to choose.

Putting a catchy harmonious R&B stamp on it, they performed their own adaptation of the hit energetically, proving their talent.

'We have eight people left and halfway through the competition and you've created a unique recognisable and distinguished style and you've just got it right', Simon said of her performance

Rocking the show: Closing the show was Five After Midnight with the Spice Girls' Say You'll Be there-their third song choice which took them a day to choose

The band rocked the stadium with the nineties hit, adding a few impressive dance moves as they harmonised the chorus.

And the judges were impressed by the tuneful performance, giving them a standing ovation to cheers from the crowd.

'Tonight is a game changer, what you did to that song has brought you so much credibility. You made it sound like Stevie Wonder, you brought so much soul to The Spice Girls,' Nicole said. 

'Everything was right,' Sharon added while Simon added, 'you just landed'. 

'Congratulations Louis', Simon joked begrudgingly, 'Boy power!'. 

X factor will be back on Sunday with Robbie Williams and Emily Sande performing, where the next act will be eliminated, leaving just seven. 

Ending the show with a bang! Putting a catchy harmonious R&B stamp on it, they performed their own adaptation of the hit energetically, proving their talent

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