5 Things We Learned From Justin Bieber’s Twitter MeltdownJustin Bieber’s first week as a 19-year-old isn’t off to a good start. He even dubbed it his “worst" birthday on Twitter. While touring in London he’s been reamed by the press for his lateness, reckless behavior, and scrutinized for every girl he’s seen with. The guy just can’t catch a break. So, he took to Twitter to let his frustrations out.