Hailey Bieber is a doting aunt as she cradles and sings to her adorable five-month-old niece Iris

Hailey Bieber looked every inch the doting aunt as she cradled her older sister Alaia Baldwin’s five-month-old baby Iris in a series of new snaps on her Instagram Story.

As the 24-year-old supermodel bonded with her darling niece, who she affectionally nicknamed her ‘little pickle,’ she filmed herself crooning a song from her childhood.

‘Nana used to sing this to me as a baby,’ the Vogue cover girl captioned footage of herself and a relative seemingly reciting a nursery rhyme in Portuguese.

Mini-me niece: Hailey Bieber looked every inch the doting aunt as she cradled her older sister Alaia Baldwin’s five-month-old baby Iris in a series of new snaps on her Instagram Story

She most likely learned the children’s song from her maternal grandmother, Mary Ellen Deodato, who is Brazilian. 

‘I can’t,’ the wife of Justin Bieber gushed of the adorable infant, who wore a matching set with a cute pattern, which included a cartoon bear, cabin and pines trees. 

While soaking in some quality time with Iris, Hailey showcased her gym-honed abs in a tiny white sports bra and a pair of high-waisted jeans.  

Cool aunt: As the 24-year-old supermodel bonded with her darling niece, who she affectionally nicknamed her 'little pickle,' she filmed herself crooning a song from her childhood

Cool aunt: As the 24-year-old supermodel bonded with her darling niece, who she affectionally nicknamed her ‘little pickle,’ she filmed herself crooning a song from her childhood

'Nana used to sing this to me as a baby,' the Vogue cover girl captioned footage of herself and a relative seemingly speaking Portuguese nursery rhyme

‘Nana used to sing this to me as a baby,’ the Vogue cover girl captioned footage of herself and a relative seemingly speaking Portuguese nursery rhyme

She accessorized with a dainty gold necklace and wore her bright blonde hair in two braids. 

Earlier this month, her musician husband shared snaps with his wife snuggling up next to an infant boy he called his nephew while vacationing with family and friends on a recent trip to Hawaii.

In one snap, the Grammy winner could be seen holding the child in one shot taken during their tropical holiday, dressed in a bright orange hoodie from his Drew collection.  

Baby fever: She styled her laid-back look with a pair of high-waisted jeans and gold necklace

Stylish: While soaking in some quality time with Iris, Hailey showcased her gym-honed abs in a tiny white sports bra

‘I can’t,’ the wife of Justin Bieber gushed of the adorable infant, who wore a matching set with a cute pattern, which included a cartoon bear, cabin and pines trees

She most likely was referring to her maternal grandmother, Mary Ellen Deodato, who is Brazilian, when reciting a Portuguese nursery rhyme

She most likely was referring to her maternal grandmother, Mary Ellen Deodato, who is Brazilian, when reciting a Portuguese nursery rhyme

Off-duty model: She accessorized with a dainty gold necklace and wore her bright blonde hair in two braids

Off-duty model: She accessorized with a dainty gold necklace and wore her bright blonde hair in two braids

The Canadian native had a look of utter contentment on his face, considering he has long stated in interviews that he hoped to become a father at a young age.

In another image he shared, the spouses could be seen showering their nephew, believed to be the son of pals Joe Termini and wife Kelia Moniz, while in a pool of water.

‘Practice,’ the Holy singer captioned the shot showing Hailey fixing the baby’s shorts as her husband cupped his tiny head. 

Even back when he was a teenage star, Justin was open about his desire to be a dad and have a large family.

Preparing for fatherhood: 'Practice,' the pop superstar recently declared in a snap showing Hailey fixing his baby's shorts as her husband cupped his tiny head

Preparing for fatherhood: ‘Practice,’ the pop superstar recently declared in a snap showing Hailey fixing his baby’s shorts as her husband cupped his tiny head

In December, he declared he would like as many kids as wife ‘Hailey is willing to push out’ on The Ellen DeGeneres Show.

The musician, who tied the knot with the supermodel in 2018, said he is looking forward to becoming a father to ‘a little tribe’ in the not too distant future.’ 

The Sorry hitmaker explained while Hailey ‘wants to have a few’ kids, she ‘still has some things to accomplish as a woman’ and ‘isn’t ready’ to become a mother just yet. 

He added: ‘I’d love to have myself a little tribe, but it’s her body and whatever she wants to do. I think she wants to have a few.’  

Future dad: In December, Justin declared he would like as many kids as wife 'Hailey is willing to push out' on The Ellen DeGeneres Show

Future dad: In December, Justin declared he would like as many kids as wife ‘Hailey is willing to push out’ on The Ellen DeGeneres Show