YouTube was fined $170 million for collecting data on child users.
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Google announced that it had acquired YouTube for $1.65 billion.
A shooting took place at YouTube's headquarters in San Bruno, California.
YouTube Live had the largest viewed broadcast ever, with guest artists performing from San Francisco and Tokyo.
The vice president of Google, Susan Wojcicki, became the CEO of YouTube.
The 7-year old Ryan of 'Ryan Toysreview' was announced as the year's highest-paid YouTube star earning $22 million.
