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30 January 2012, 12:31
The 'One Thing' singer was was seen relaxing in the US with the boy band before they shoot their Nickelodeon appearance.
One Direction star Harry Styles was pictured relaxing with his band mates in Los Angeles over the weekend as they prepared to shoot their appearance on Nickelodeon teen sitcom iCarly.
The 'What Makes You Beautiful' singer joined Niall, Louis, Zayn and Liam poolside at their hotel where they were earlier greeted by hundreds of screaming fans.
The band achieved a similar welcome when they arrived in the country on Saturday (28th January) but were told by US Marshalls that it wasn't safe for them to meet their fans.
Meanwhile, the former X Factor stars are due to head out on their first ever American tour next month as they support Big Time Rush.
You can view a picture of Harry in Los Angeles below. (Picture: Big Pictures)