Justin Bieber's ex Jayde Pierce is just weeks away from meeting her baby girl!

The social media model is expecting her first child with boyfriend Mike Dixon, and showed off her baby bump at 31 weeks pregnant.

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Wearing a olive sports bra and oversized sweatpants, the British beauty cradles her growing belly in the mirror selfie on Instagram.

"You are causing mummy a lot of pain but I know you are worth it," she captioned the pic.

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Jayde, 21, announced she was having a girl with a fun gender reveal last month.

"We're having a girl!!!!! So glad you guys finally know," she wrote. "Thank you for your kind words!"

For a look back at Justin's dating history, check out the gallery below!