Justin Bieber made his first tweet at 8:27 pm, promoting his single “One Time.”
Source
Twitter was launched to the public.
Chris Messina Tweeted #barcamp, which became the first use of a hashtag on Twitter.
Psy's 'Gangnam Style' music video became the most viewed video on YouTube, passing 800 million views.
Justin Bieber was born in Stratford, Canada.
Donald Trump was permanently suspended from Twitter due to the risk of further incitement of violence.
