One Direction - Aug. 2, 2013 at Mandalay Bay

Liam Payne, Louis Tomlinson and Zayn Malik of One Direction perform at Mandalay Bay Events Center on Friday, Aug. 2, 2013.

Liam Payne, Louis Tomlinson and Zayn Malik of One Direction perform at Mandalay Bay Events Center on Friday, Aug. 2, 2013. by Sam Morris / Las Vegas Sun

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