Complex sentence: Bieber released his third studio album "Believe" on June 19,2012, and it became his fourth chart topper in the United States, debuting at number-one on the "Billboard" 200.
Split into simpler sentences: Bieber released his third studio album "Believe" in June 2012. It became his fourth chart topper in the United States, debuting at number-one on the "Billboard" 200.