A packed Times Square in New York welcomed in the New Year at what was 6pm tonight in New Zealand.
Hundreds of thousands of revellers braving sub-zero conditions to cheer the annual drop of a crystal ball.
Pop legend Mariah Carey was just one of the stars keeping spirits up, a brave call after bungling last year's performance.
Police were taking no chances with thousands of extra officers, including snipers, creating a so-called "ring of steel".
And tight security was in place as European capitals ushered in the new year.
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From London to North Korea, extravagant fireworks displays marked the start of 2018.
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