My lovely lady humps! Fergie flaunts her VERY ample assets before cheekily shaking her behind in skimpy outfit at Holiday Jam concert in New York City

She has faced a tough year after breaking up with her husband.

But Fergie ensured her ex Josh Duhamel certainly knew what he was missing as she put on a very sexy display during a performance at the 102.7 Holiday Jam concert at the Beacon Theater in New York City.

The singer, 42, showed off her ample assets in a skintight vest as she danced provocatively with a chair on center stage.

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 Hot stuff! Fergie ensured her ex Josh Duhamel certainly knew what he was missing as she put on a very sexy display during a performance at the 102.7 Holiday Jam concert at the Beacon Theater in New York City

 Hot stuff! Fergie ensured her ex Josh Duhamel certainly knew what he was missing as she put on a very sexy display during a performance at the 102.7 Holiday Jam concert at the Beacon Theater in New York City

Fergie- real name Stacy Ann Ferguson- stepped out wearing a black lace jumpsuit, that featured a tie-up top that showcased the singer's perky assets.

The mother-of-one teamed her attire with a blue velvet and jeweled cropped jacket.

Fergie was seen wearing black suede boot-heels that zipped in the back.

The Big Girls Don't Cry songstress kept her blonde colored locks loosely curled, while finishing her look with glam make-up and a burgundy pout.

The dutchess: On Wednesday, Fergie made sure to give fans a sexy performance while on stage at the 102.7 Holiday Jam concert at the Beacon Theater in New York City

The dutchess: On Wednesday, Fergie made sure to give fans a sexy performance while on stage at the 102.7 Holiday Jam concert at the Beacon Theater in New York City

Front and center: The singer, 42, was seen belting out her new hits as she danced provocatively on center stage - before cheekily wiggling her behind to the crowd
Front and center: The singer, 42, was seen belting out her new hits as she danced provocatively on center stage - before cheekily wiggling her behind to the crowd

Front and center: The singer, 42, was seen belting out her new hits as she danced provocatively on center stage - before cheekily wiggling her behind to the crowd

From behind: Fergie- real name Stacy Ann Ferguson- stepped out wearing a black lace jumpsuit, that featured a tie-up top that showcased the singer's pert behind

From behind: Fergie- real name Stacy Ann Ferguson- stepped out wearing a black lace jumpsuit, that featured a tie-up top that showcased the singer's pert behind

The Southern California native accessorized her outfit with multiple black and diamond rings, that perfectly complimented her black claw-shaped nails.

Fergie was seen getting into the music by squatting down to fans and belting out her soulful lyrics.

The estranged wife of actor Josh Duhamel was also seen thrusting the air and shaking her derriere to the front of the stage.

The 42-year-old really got into her performance when she slid down into the splits and still kept on singing.

The details: The Southern California native accessorized her outfit with multiple black and diamond rings, that perfectly complimented her black claw-shaped nails

The details: The Southern California native accessorized her outfit with multiple black and diamond rings, that perfectly complimented her black claw-shaped nails

She's a star! Fergie was seen getting into the music by squatting down to fans and belting out her soulful lyrics

She's a star! Fergie was seen getting into the music by squatting down to fans and belting out her soulful lyrics

Fergie recently released her Double Dutchess album in September, which was put out eleven years after her first solo album.

The sexy siren and Josh revealed that they were separating around the same time that the pop star released her album.

The two amicably co-parent their four-year-old son Axl in California.

Getting low: The 42-year-old really got into her performance when she slid down into the splits and still kept on singing

Getting low: The 42-year-old really got into her performance when she slid down into the splits and still kept on singing

Making a comeback: Fergie recently released her Double Dutchess album in September, which was put out eleven years after her first solo album

Making a comeback: Fergie recently released her Double Dutchess album in September, which was put out eleven years after her first solo album

The estranged wife of actor Josh Duhamel was also seen thrusting the air and shaking her derriere to the front of the stage
The estranged wife of actor Josh Duhamel was also seen thrusting the air and shaking her derriere to the front of the stage

On stage: The estranged wife of actor Josh Duhamel was also seen thrusting the air and shaking her derriere to the front of the stage

Her personal life: The sexy siren and Josh revealed that they were separating around the same time that the pop star released her album

Her personal life: The sexy siren and Josh revealed that they were separating around the same time that the pop star released her album

Joining Fergie on the line-up was 90s boy-band Backstreet Boys.

Nick Carter-the brother of Aaron Carter- was seen in a maroon T-shirt and bomber jacket, which he casually paired with light-denim jeans.

Howie Dorough matched Nick by sporting a maroon colored T-shirt, but opted for a gray denim jacket instead.

Their other band-mate Brian Littrell wore a white shirt, jacket, and maroon colored pants for their electric performance.

They're back! Joining Fergie on the line-up was 90s boy-band Backstreet Boys

They're back! Joining Fergie on the line-up was 90s boy-band Backstreet Boys

Matching: Howie Dorough matched Nick by sporting a maroon colored T-shirt, but opted for a gray denim jacket instead

Matching: Howie Dorough matched Nick by sporting a maroon colored T-shirt, but opted for a gray denim jacket instead

Their other band-mate Brian Littrell wore a white shirt, jacket, and maroon colored pants for their electric performance
Nick Carter-the brother of Aaron Carter- was seen in a maroon T-shirt and bomber jacket, which he casually paired with light-denim jeans

A performance of a lifetime: Their other band-mate Brian Littrell wore a white shirt, jacket, and maroon colored pants for their electric performance

Getting into it! Nick Carter-the brother of Aaron Carter- was seen in a maroon T-shirt and bomber jacket, which he casually paired with light-denim jeans

Getting into it! Nick Carter-the brother of Aaron Carter- was seen in a maroon T-shirt and bomber jacket, which he casually paired with light-denim jeans

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Fergie performs at the 102.7 Holiday Jam concert in NYC

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