Niall Horan puts his thumb up to signal he's having a great night.
One Direction meet fans at new Where We Are book signing in London
Fight! One Direction throw popcorn at This Is Us film photocall
One Direction meet screaming fans at This Is Us movie premiere in London
One Direction enjoy popcorn fight at This Is Us film photocall in London
Harry Styles' hair history: From cute curls to sexy man bun
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Â£500 to spend on designer fashion house â Shade Station!