Justin Bieber reached one million followers on Twitter.
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Psy's 'Gangnam Style' music video became the most viewed video on YouTube, passing 800 million views.
Justin Bieber made his first tweet at 8:27 pm, promoting his single 'One Time.'
Twitter was launched to the public.
Donald Trump was permanently suspended from Twitter due to the risk of further incitement of violence.
Justin Bieber was born in Stratford, Canada.
