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Justin Bieber's hugely successful 2011 concert documentary is set to get its television premiere this weekend.  "Never Say Never" will premiere Sunday night on MTV, and the network is gearing up for the event 24 hours in advance with a promo it's calling "Bieber O'Clock." 

Starting Saturday at 8 p.m. Eastern, MTV be airing exclusive interviews with the pop star and his friends and family leading into "Never Say Never," the documentary about Justin's rise to fame that's grossed almost 100 million dollars worldwide.  The Biebs pokes fun at himself in a teaser for the special, saying that in "the next 24 hours you might find out why I really do not like wearing shirts."  

Meantime, Justin is making history with his 2010 single "Baby."  The Recording Industry Association of America has announced that the song is now the best-selling digital song ever, reaching Diamond certification.  

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