Justin Bieber Promotes His Book First Step 2 Forever

Justin Bieber seems to be growing up before our eyes, and no doubt with his good looks, this kid is destined to be a heartbreaker.

Even though today is considered a holiday, young Biebs was hard at work .... braving the New York City crowds to promote his book, Justin Bieber: First Step 2 Forever, which chronicles his rise to fame as a young performer.

Thousands of kids waited in line at Barnes & Noble just to catch a glimpse of the 16-year-old singer.

Up next for Biebs ... an acoustic album that will hit stores just in time for Christmas. We can't wait!