Kendall Jenner rocks a pair of black leggings as she and Hailey Bieber hit the gym in LA

Kendall Jenner and her longtime best friend Hailey Bieber bundled up on a chilly day as they headed to a workout session together in Los Angeles on Sunday.  

As the supermodels prepared for a grueling sweat session to maintain their envy-inducing physiques, they both wore black face masks amid the COVID-19 pandemic.

While sporting a bulky black leather jacket and brown leggings, the 24-year-old wife of Justin Bieber rocked a high ponytail and toted a warm beverage.  

Model BFFs: Kendall Jenner and her longtime best friend Hailey Bieber bundled up on a chilly day as they headed to a workout session together in Los Angeles on Sunday

Hailey accessorized her gym-ready ensemble with her $500,000 engagement ring, furry white slippers and matching socks.

Meanwhile, Jenner showcased her tiny waist and long legs in a pair of skintight black leggings, which hugged every curve of her incredibly toned frame. 

Despite keeping the majority of her trim midriff concealed under a sweatshirt, her defined abs momentarily peaked out from her fuzzy pullover. 

Fit: As the models prepared for a grueling sweat session to maintain their envy-inducing physiques, they both sported black face masks amid the coronavirus pandemic

Fit: As the models prepared for a grueling sweat session to maintain their envy-inducing physiques, they both sported black face masks amid the coronavirus pandemic

The reality star completed her look with beige moccasins and kept a sleek black purse on her shoulder. 

Earlier in the day, Hailey’s husband sang her praises as he showed off their holiday decorations.

‘Way better with you baby,’ the Yummy star, 26, captioned a comparison split-photo showing Bieber dressing the tree alone in 2017 on the left, and he and Hailey sharing in the experience in 2020 on the right. 

Abs: Jenner showcased her tiny waist and long legs in a pair of skintight black leggings, which hugged every curve of her incredibly toned frame

Gym-ready: While sporting a bulky black leather jacket and brown leggings, the 24-year-old wife of Justin Bieber rocked a high and tight ponytail

Looking good: Despite keeping the majority of her trim midriff concealed under a sweatshirt, Kendall’s defined abs momentarily peaked out from under her fuzzy pullover

The 2017 image shows Justin reaching out to place the all-important star on the top of the tree shirtless; dressed only in brown khakis, all by his lonesome self.

Remember, at the time, the singer-songwriter had been in an on-again, off-again relationship with Selena Gomez since 2010, and he hadn’t yet reconciled with Hailey, which happened in May 2018.

The Canadian native can be seen in a similar position in the 2020 image, where he’s putting the star on the tree. Only this year, he’s dressed in black sweatpants, a hoodie and beanie cap, with Hailey standing by his side to share in the holiday tradition.

Exercise session: She accessorized her gym-ready ensemble with her $500,000 massive engagement ring, furry white slippers and matching socks

Exercise session: She accessorized her gym-ready ensemble with her $500,000 massive engagement ring, furry white slippers and matching socks

Justin posted a longer version of the time-lapse video on his Instagram page that begins with the couple placing string lights around the tree.

‘About that time again,’ he wrote in the caption of video that appears to have been shot in a room near the back of their home.

As the sped-up sequences move forward, the tree is quickly adorned with many of the Christmas tree favorites. 

Heartfelt: Justin Bieber confessed to his wife Hailey that the Christmas tree decorating tradition is 'way better with you' in an Instagram post

Heartfelt: Justin Bieber confessed to his wife Hailey that the Christmas tree decorating tradition is ‘way better with you’ in an Instagram post

The pop superstar shared a time-lapse video on Instagram to give his 152 million fans and followers a look at their festive time setting up all the tinsel, lights and ornaments

The pop superstar shared a time-lapse video on Instagram to give his 152 million fans and followers a look at their festive time setting up all the tinsel, lights and ornaments

The Love yourself star also shared a shorter version of the time-lapse video, along with an audio clip of his holiday song Christmas Love, which was featured on his holiday-inspired 2011 studio album Under the Mistletoe.

He could be heard singing: ‘You are the one — You’re my very own Christmas love,’ in a not-so-subtle reference to his wife in the first clip showing the couple decorating the tree.

Justin also added the following lines of the tune: ‘Tell Santa I’m cool this year — My present is standing right here — Thank God above for my very own Christmas love.’

Festive: As the video moved along, Justin and Hailey could be seen adding more decorations

Festive: As the video moved along, Justin and Hailey could be seen adding more decorations