Dirrty singer Christina ‘Xtina’ Aguilera flashed a Las Vegas audience with her black X-shaped pasties during her New Year’s Eve concert at Planet Hollywood Resort & Casino’s Zappos Theater.

The 39-year-old mother-of-two’s wardrobe malfunction was due to her dangerously plunging white leotard from costumer Karen Clarkson and designer Gareth Pugh.

The five-time Grammy winner dressed the rest of her curvaceous 5ft2in figure in matching thigh-high bedazzled boots and a Barbie-style ponytail extension fastened by hairstylist Rob Talty.

Christina Aguilera invents ‘FAKE’ countdown to 2020 during show

Dirrty! Christina 'Xtina' Aguilera flashed a Las Vegas audience with her black X-shaped pasties during her New Year's Eve concert at Planet Hollywood Resort & Casino's Zappos Theater
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Dirrty! Christina ‘Xtina’ Aguilera flashed a Las Vegas audience with her black X-shaped pasties during her New Year’s Eve concert at Planet Hollywood Resort & Casino’s Zappos Theater

Oops! The 39-year-old mother-of-two's wardrobe malfunction was due to her dangerously plunging white leotard from costumer Karen Clarkson and designer Gareth Pugh
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Oops! The 39-year-old mother-of-two’s wardrobe malfunction was due to her dangerously plunging white leotard from costumer Karen Clarkson and designer Gareth Pugh

As usual, Christina sported a heavy-handed, fully-contoured complexion with pink shimmery shadow and a red pout applied by make-up artist Etienne Ortega.

Aguilera’s show was broadcast live during CNN special New Year’s Eve Live hosted by Anderson Cooper and Andy Cohen.

The Staten Island-born, half-Ecuadorian songstress also did an onstage champagne toast and countdown at midnight alongside her dancers and crew.

The Haunted Heart hitmaker used her unmistakable four-octave soprano pipes to belt hits like Genie in a Bottle, Reflection, Ain’t No Other Man, Can’t Hold Us Down, Beautiful, and Fighter.

The five-time Grammy winner dressed the rest of her curvaceous 5ft2in figure in matching thigh-high bedazzled boots
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She wore a Barbie-style ponytail extension fastened by hairstylist Rob Talty
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Blonde ambition: The five-time Grammy winner wore matching thigh-high bedazzled boots and a Barbie-style ponytail extension fastened by hairstylist Rob Talty

Heavy handed: As usual, Christina sported a fully-contoured complexion with pink shimmery shadow and a red pout applied by make-up artist Etienne Ortega
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Heavy handed: As usual, Christina sported a fully-contoured complexion with pink shimmery shadow and a red pout applied by make-up artist Etienne Ortega

'Let's take 2020 by storm!' Aguilera's show was broadcast live during CNN special New Year's Eve Live hosted by Anderson Cooper and Andy Cohen
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‘Let’s take 2020 by storm!’ Aguilera’s show was broadcast live during CNN special New Year’s Eve Live hosted by Anderson Cooper and Andy Cohen

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Glow in the dark! The Staten Island-born, half-Ecuadorian songstress also did an onstage champagne toast and countdown at midnight alongside her dancers and crew

Christina – who canceled her show Friday due to sickness – resumes the fourth leg of her residency of her 25-date, $7.68M-grossing The Xperience residency at the same venue on February 26.

$1 from each ticket sold reportedly benefits The Shade Tree, a non-profit shelter in Southern Nevada for women and children.

‘What a year 2019!’ Aguilera – who boasts 49.7M social media ‘Fighters’ – wrote.

‘I’ve had an amazing year celebrating so many milestones with you! Thank you for your endless support and helping me close out this decade with a bang. I love you all! 2020 baby, here we go!’

Christina Aguilera delights crowd as she kicks off tour in Dublin

Hit parade: The Haunted Heart hitmaker used her unmistakable four-octave soprano pipes to belt hits like Genie in a Bottle, Ain't No Other Man, Can't Hold Us Down, and Beautiful
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Hit parade: The Haunted Heart hitmaker used her unmistakable four-octave soprano pipes to belt hits like Genie in a Bottle, Ain’t No Other Man, Can’t Hold Us Down, and Beautiful

Christina resumes the fourth leg of her residency of her 25-date, $7.68M-grossing The Xperience residency at the same venue on February 26
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She canceled her show Friday due to sickness
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HBIC: Christina resumes the fourth leg of her residency of her 25-date, $7.68M-grossing The Xperience residency at the same venue on February 26

'Here's to making more magic in the new year!' $1 from each ticket sold reportedly benefits The Shade Tree, a non-profit shelter in Southern Nevada for women and children
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‘Here’s to making more magic in the new year!’ $1 from each ticket sold reportedly benefits The Shade Tree, a non-profit shelter in Southern Nevada for women and children

Showgirl: Xtina showcased a variety of colorful looks including a pink feathered coat designed by Amy Addison
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Showgirl: Xtina showcased a variety of colorful looks including a red voluminous sheer creation
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Showgirl: Xtina showcased a variety of colorful looks including a pink feathered coat designed by Amy Addison and a red voluminous sheer creation

Afterwards, the former Mouseketeer donned a double-breasted blazer to hit up a Sin City club with her dancers – a ritual she has no plans on ending just because she’s a mother.

‘I still make time for [partying] with my dancers [for] the camaraderie, you know, to have that bond with who’s backing you onstage. The unity there is so important,’ the platinum-blonde pop diva said on Friday’s episode of LIVE with Kelly and Ryan.

‘It’s like a family, but I’ve my own family now that I’ve created. I have my son and my daughter, and just to have their love and see things through their eyes.’

As Christina performed on Tuesday, her Burlesque PA-turned-fiancé Matthew Rutler could be seen waiting in the wings holding their sleepy five-year-old daughter Summer.

Christina Aguilera expresses her love & gratitude for her fans

Aguilera tweeted: 'I've had an amazing year celebrating so many milestones with you! Thank you for your endless support and helping me close out this decade with a bang. I love you all! 2020 baby, here we go!'

Aguilera tweeted: ‘I’ve had an amazing year celebrating so many milestones with you! Thank you for your endless support and helping me close out this decade with a bang. I love you all! 2020 baby, here we go!’

'I still make time!' Afterwards, the former Mouseketeer hit up a Sin City club with her dancers - a ritual she has no plans on ending just because she's a mother
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‘I still make time!’ Afterwards, the former Mouseketeer hit up a Sin City club with her dancers – a ritual she has no plans on ending just because she’s a mother

The platinum-blonde pop diva said on Friday's episode of LIVE with Kelly and Ryan: 'The unity there is so important. It's like a family, but I've my own family now that I've created'
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The platinum-blonde pop diva said on Friday’s episode of LIVE with Kelly and Ryan: ‘The unity there is so important. It’s like a family, but I’ve my own family now that I’ve created’

‘When I can, I bring my son [Max on tour]. He’s [nearly 12],’ Aguilera said of her child with ex-husband Jordan Bratman.

‘They get to see the world from a view that not many people get from such a young age…School is very important, so we make sure it doesn’t collide or clash with anything super important, because I think it’s great for kids to have their own lives and to have their own routines, and structure.’

The Golden Globe nominee added: ‘But it’s also important for them to see momma do her work. This is why we have a beautiful life and things to be thankful for, because you have to work in life and work hard for it.’

There’s still no date set for the Fall in Line singer’s long-awaited nuptials to the 34-year-old MasterClass investor, who popped the question way back on Feburary 14, 2014.

Christina Aguilera brings her family to Addams Family premiere

Waiting in the wings: As Christina performed on Tuesday, her Burlesque PA-turned-fiancé Matthew Rutler (R) could be seen holding their sleepy five-year-old daughter Summer (2-R)
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Waiting in the wings: As Christina performed on Tuesday, her Burlesque PA-turned-fiancé Matthew Rutler (R) could be seen holding their sleepy five-year-old daughter Summer (2-R)

Aguilera said of her child with ex-husband Jordan Bratman: 'When I can, I bring my son [Max on tour]. He's [nearly 12]...They get to see the world from a view that not many people get from such a young age' (pictured November 10)
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Aguilera said of her child with ex-husband Jordan Bratman: ‘When I can, I bring my son [Max on tour]. He’s [nearly 12]…They get to see the world from a view that not many people get from such a young age’ (pictured November 10)

'Life is good with these three': There's still no date set for the Golden Globe nominee's long-awaited nuptials to the 34-year-old MasterClass investor (R), who popped the question way back on Feburary 14, 2014 (pictured November 6)
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‘Life is good with these three’: There’s still no date set for the Golden Globe nominee’s long-awaited nuptials to the 34-year-old MasterClass investor (R), who popped the question way back on Feburary 14, 2014 (pictured November 6)