Justin Bieber is one proud big bro after announcing the birth of his baby sister!
JB just revealed the bundle of joy to the world, saying, "Meet the newest bieber, my little sister BAY BIEBER."
Bay Bieber was born at 8:30 AM in Bieber's hometown of Stratford, Ontario. 6 hours earlier Bieber's dad, Jeremy, announced that he was about to have the baby.
Jeremy and Justin announced the incoming family member days after the 43-year-old tied the knot with his wife, Chelsey, earlier this year in Jamaica.