Justin Bieber Announces Retirement on Twitter

As his "Believe" documentary hits theaters, the musician tweeted his decision on Christmas Eve, still reassuring fans that he will be "here forever." This story first appeared on Billboard.com. Justin Bieber handed a bitter Christmas present to millions of Beliebers. Just before midnight on Christmas Eve (Dec. 24), the singer tweeted that he was "officially retiring." PHOTOS: Justin Bieber's 'Believe': The World Premiere in Pictures However, Bieber calmed the nerves (and likely confused the mind...