They've both been linked to pop star Justin Bieber.
But clearly Sofia Richie, 18, and Bronte Blampied don't let a guy get between their friendship.
They continued their BFF journey on Monday by flashing their tummies in unison on a trip to a studio in West Hollywood, California.
BFFS: Sofia Richie, 18, and Bronte Blampied hung out in West Hollywood on Monday
Sofia, 18, teamed her tied-up T-shirt with sweat pants and sneakers, as she flaunted her physique.
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Share 16 sharesThe daughter of pop legend Lionel added a red and white Puma zip-up hoodie.
She has been spending a lot of time with her new partner in crime, with the pair sharing images from their friendship on social media.
Justin-in-common: They continued by flashing their tummies in unison on a trip to a studio in West Hollywood, California
Plenty to smile about: Bronte offered a beaming grin as they stepped out
Bronte certainly didn't travel light, and towed a giant suitcase on wheels.
They hung out over the weekend, and documented their fun on Snapchat.
In the video, Sofia sat in a vehicle as her pal made her way into the car.
'...Yet again, another day with Bronte,' said the 18-year-old.
Work out gear: Sofia, 18, teamed her tied-up T-shirt with sweat pants and sneakers, as she flaunted her physique
Stepping out: The teenager showed off her sporty side during her latest appearance
Bieber's babes: The daughter of pop legend Lionel added a red and white Puma zip-up hoodie
Let's go: Sofia led the way as the two pals departed on Monday afternoon
Going somewhere? Bronte certainly didn't travel light, and towed a giant suitcase on wheels
Heading off: They've both been linked to pop pixie Justin Bieber
Extra baggage: Sofia and Bronte were weighed with luggage down as they climbed into their car
Sofia famously romanced Justin Bieber for one month over the summer.
And Bronte was also linked to the Sorry star, when they were spotted partying in Hawaii and London.
In August, Justin and Sofia were also reported to have hung out together in the UK.
'Every night, she went back to his luxury apartment. They looked like a couple, and she stayed over at his place,' a source told People.
'Although there was no PDA while they were out and about, 'she was with him the whole weekend and never left his side,' says the source.
Their time: Sofia and Justin snapped a selfie together earlier this summer
Time together: Justin and Bronte are seen in Hawaii
That same month, Bronte shared a photo floating with pals in Hawaii, which also included Justin.
'Floatie floatie,' she wrote.
If either of the girls did date Justin, they do not appear to have any ill-will towards each other.
Bronte recently posted a snap of them together to Instagram, captioned: 'Me and a cute germ I found @sofiarichie.'
Close pals: Bronte recently posted a snap of them together, captioned: 'Me and a cute germ I found @sofiarichie
Share a bond! Sofia Richie, 18, has found a friendship with model Bronte Blampied
Good point: Sofia reposted this declaration she found on Rihanna's Instagram
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