Haley Bieber has been rapidly adding to her sentimental jewelry collection since she and husband Justin Bieber welcomed their first baby (baby, oh!) in August. ), has been rapidly adding to her sentimental jewelry collection since welcoming her first child in September, when she debuted a sparkling “MOM” ring in honor of their son, Jack Bruce Bieber, and now she's matching her ever-present bubble “B” pendant She shows off her blinged-out necklace.

The Lorde founder shared a carousel of photos on Instagram on Tuesday, October 1, with the particularly sweet caption, “It's October and I'm someone's mom. 🎃.” In the photo, she showed off her latest trendy manicure, sporting midnight blue nails while clutching what appeared to be a brand new espresso brown shade of Lorde's cell phone case.

But it was her new necklace that caught my attention. Hayley's favorite Alex Moss “B” pendant (Bieber's, naturally) was stacked with a new and equally sparkly initial necklace from the celebrity jeweler, spelled “jbb” (Jack Bruce Bieber) in lowercase letters. Adorable.

Moss posted a close-up video of the diamond-studded bubble letters on Instagram on Friday, writing “Jack Bruce Beaver” and tagging Haley.

Alex Moss' custom pieces feature approximately 4 carats of natural white diamonds pave-set in 14k gold; along with the “B” necklace, these pieces tell the story of her journey from newlywed to new mother.

Along with a very ornate push present, Bieber also owns the aforementioned “MOM” ring.

Diamonds aside, the skincare guru shared a photo of the back of her husband Justin's baseball cap emblazoned with “Jack Bruce” and showed fans two other accessories dedicated to her son.

Hayley also posted a photo of a Goyard tote bag on her Instagram Stories on October 2. The luxe bag was monogrammed with the words “JBB.”

Inside, she carries everything from baby bottles to electrolyte drink mixes to a Saint Laurent card case, proving that moms can be both stylish and ready for anything. She also unveiled three new Rohde's products, all adorned with heart emojis.

As for her new necklace, perhaps she can gift a matching one to baby Jack when he's older.