All American boys: One Direction storm the U.S with their first ever gig (and Harry even did his hair!)
They looked good, and the crowd certainly thought they were beautiful.
As One Direction attempt to break America, their first US gig kicked off with a spark with crowds behaving like the boys had been their forever, by screaming the house down.
And the five certainly appreciated it with Irish blond teenager Niall Horan, 18, even dubbing the band's across the shore audience US directioners.
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You're beautiful: One Direction in Chicago, looking every inch the All American boys
Performing in Chicago the boys looked very inch the all American heroes with their management obviously pulling out all the stops to create a polished boy band to the windy city audience.
Stylists had obviously been at work with Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson as they sported crisp high school trousers with sports jackets.
And fresh from their Brit Award the boys seemed to love the U.S audiences as much as their UK fans with a crowd rousing version of You're Beautiful.
We can do this! The boys have a huddle before they go on infront of U.S audiences
Dressed to impress: Louis Tomlinson and Harry Styles show off their crisp look to U.S. audiences
Singing their hearts out: Zayn Malik and Niall Horan show they mean it at their first ever U.S. gig
Grateful: Niall shows his appreciation over Twitter
And they boys are doing well with single What Makes You Beautiful scoring them the highest debut for a UK act in the US singles chart for almost 14 years.
It seems to be good news for the boys this side of the pond as well as One Direction sold out their first arena tour, selling 300,000 tickets in one fell swoop.
The tour, which kicks off in February 2013, includes seven shows at London's 02 Arena, plus four in Belfast and another four in Dublin.
Sing like you mean it: Harry Styles shows off his vocal skills in Chicago
Stateside: Niall Horan and Louis Tomlinson look sharp as they sing in Chicago
Crowds queued for hours, with some making it over 40, just to get their hand on tickets for the groups tour.
Tents were pitched and fans clutched on duvets as they waited for tickets.
But don't worry fans, they definitely appreciate it with Horan tweeting: 'Very exciting news, you guys are absolutely incredible, the best fans in the world by a long shot.'
A long wait… but it's going in One Direction: One Direction queue at the Manchester Arena