The 1D star is still adjusting to fame

It seems their crazy trip to the US has proved to be quite a shock for One Direction

The boys have been causing hysteria with their new fans across the pond and Irish member Niall Horan, 18, is trying to get his head around it.

‘I get really claustrophobic and sometimes it’s a bit scary,’ says Niall.

‘I rang my dad and told him how mad it’s been. He said he’s been watching it all on YouTube.’

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Carl Smith