Justin Bieber Has A New Sister!

We now know why he's been hanging out in his hometown

Justin Bieber welcomes his new baby sister! It appears that Justin’s appearance with his new fiancee last weekend was for a much bigger reason. Justin was waiting for the arrival of his new sibling… Yesterday his stepmother Chelsey Rebelo gave birth to a baby girl. Justin shared the great news with his fans, taking to Instagram writing, “my little sister BAY Bieber (sic).”

Meet the newest bieber, my little sister BAY BIEBER

A post shared by Justin Bieber (@justinbieber) on

Justin is a great big bro!