JUSTIN Bieber is a big brother once more after his father, Jeremy, welcomed his fourth child.
The 24yrs old Canadan pop prince was delighted to share the news of his expanding family with fans on social media.
Taking to Instagram on Thursday, Biebs shared a snap of his new baby sister – and revealed her rather unusual name.
“Meet the newest bieber, my little sister BAY BIEBER,” Justin wrote as he shared a snap of the sleeping baby with his 102 million followers.
Bay is the fourth child of Justin’s father – 43-year-old Jeremy Bieber.
Justin was the product of Jeremy’s relationship with Canadian actress and producer Pattie Mallette – who raised Justin as a single mother.
Jeremy has two other children – a 10-year-old daughter named Jazmyn and an eight-year-old son named Jaxon from his marriage to office worker Erin Wagner.
Bay is the first child that Jeremy has welcomed with his latest wife, 30-year-old Canadian Instagram star Chelsey Rebelo (who already has an 11-year-old daughter named Allie from a previous relationship).