Justin Bieber and Hailey Baldwin seem to have plenty to celebrate these days, like their wedding, their beautiful blonde hair, and now, that includes Justin Bieber's new born little sister.

His dad Jeremy posted this picture on Instagram earlier this morning, declaring the birth of his daughter and her name, Bay Bieber. "We welcomed a healthy baby “Bay Bieber” born at 830 am" Jeremy wrote in the caption.

He also posted this funny picture of him going into the delivery room, writing "Dr Bieber to delivery” in the caption.

Justin posted a different picture of his new little sister. "Meet the newest bieber, my little sister BAY BIEBER," he wrote.