Justin Bieber's continuing allure for millions of young fans was cemented today when he hit the top of the iTunes album charts in nearly every country worldwide with "Believe Acoustic."<br/> <br />The album sees the 18-year-old strip down musically by doing acoustic versions of tracks from his 2012 album "Believe."<br/> <br />There's been a focus on one of three new tracks - the ballad 'Nothing Like Us.' As it's the only track on the album written solely by the young star and it's about a break-up, it's been widely reported to be about Bieber's split with fellow teen star Selena Gomez.<br/> <br />Not content with the popularity of his music, the Canadian heart-throb also became Twitter's most followed person earlier this month, overtaking Lady Gaga by over 100,000 followers.
