Justin Bieber has confessed that he feels hurt by online criticisms and nasty comments about his behavior. Last week, the singer made a surprise visit to Ellen DeGeneres’ talk show, where he was visibly nervous as he apologized for his past bad boy antics, admitting he “did some things that weren’t exactly the greatest.” Following the taping, Bieber posted a video online, telling his fans that his nerves got the best of him, and on Thursday, the pop star returned to the talk show to explain his uneasy behavior, and the reason he felt the need to make a follow-up video.