Justin Bieber stayed up past his bedtime Thursday to deliver the “Top 10” list on the “Late Show with David Letterman,” where he revealed some little known “facts” about himself. Considering that his every breath is documented on fan sites like JustinBieberZone.com, it’s pretty surprising that the singing sensation/perfume mogul has any secrets left.

For example, did you know that the Biebs doesn’t “know how to not be adorable?” Or that he “accidentally” waited in line to meet himself? Crazy, right?

Perhaps the most heartbreaking revelation was — brace yourself — his signature hairdo is actually a wig.

Watch the video below, but, please, take the necessary precautions to prevent catching Bieber Fever.