Hailey Bieber Shows Off Sweet Tribute To Son Jack: 'I'm Someone's Mom'

Hailey Bieber is reflecting on being "someone's mom" and showing off a sparkling new necklace dedicated to her son with husband Justin Bieber .

The 27-year-old new mom took to her Instagram on Tuesday (October 1) to share a carousel of several recent photos as she welcomed the start of a new month. In addition to showing off her newly-dyed hair , she debuted a stunning diamond-encrusted necklace featuring the initials "JBB" for her and the "Peaches" singer's son Jack Blues Bieber . According to Page Six , the piece of jewelry was designed by Alex Moss and includes four carats of pavé-set natural white diamonds set in 14K gold.

The sweet tribute was on display in two photos, one in a mirror selfie where she's wearing a face mask and another where the diamonds sparkled in the sun underneath a similarly blinged-out necklace of the letter "B" that she debuted earlier this year .

"It's October and I'm someone's Mom. 🎃" she captioned the photo dump.

The Biebers, who recently celebrated a special milestone in their marriage , became parents in August with the birth of their first child together. Justin announced the happy news on August 23, sharing a photo of Hailey holding their little one's foot and saying "welcome home" to baby Jack. A source recently said the couple have been "in a happy bubble" since welcoming their son and are "more in love" than ever .