Justin becomes the only artist to have notched five No. 1 albums before turning 19 years old (he turns 19 on March 1.) He was previously tied with Miley Cyrus, who had also claimed four leaders before 19.

"Believe Acoustic" features eight acoustic and/or live tracks originally found on his "Believe" studio album, released last year. "Acoustic" also includes three new recordings: "Yellow Raincoat," "I Would" and "Nothing Like Us."

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