Bieber achieved the milestone over the weekend, according to Famecount.com, a social media statistics service.
In October alone, the singer's YouTube channel received 94 million views, thanks partly to the popularity of his new single "Mistletoe," which already received over 26 million views.
Last year, Bieber narrowly missed making YouTube history when Lady Gaga beat him by days to the billion-view milestone. She now sits at No. 2 with 1.88 billion YouTube views.