WATCH: Are You One Direction's Biggest Fan? Entertainmentwise Meets Them Ahead Of Their iTunes Festival Gig

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So we all know that One Direction have one of the biggest fan bases around from the UK Directioners all the way over to the US and Australia. But who is their biggest fan?

Entertainmentwise went down to One Direction's iTunes festival show at London's Roundhouse last night to find some true Directioners.

What would you do for a date with the hotties in One Direction? Well these fans will go to any measures...

Deafening screams filled the Roundhouse as One Direction took to the stage for their one-off London show as part of the month long music event.

When Harry Styles imitated Niall Horan’s Irish accent and Zayn Malik described Harry as ''sexy'',One Directioners could no longer contain their excitement.

WATCH: Are You One Direction's Biggest Fan? Entertainmentwise Meets Them Ahead Of Their iTunes Festival GigWATCH: Are You One Direction's Biggest Fan? Entertainmentwise Meets Them Ahead Of Their iTunes Festival Gig

One Direction at the iTunes festival (Wenn)

Speaking about their return to the London stage, their first since January, Louis Tomlinson said: “We’ve spent a lot of time outside the UK and I just wanted to say how incredible it is to be back in London.”

Playing tracks from their debut effort Up All Night, One Direction blasted out 'Gotta Be You', 'What Makes You Beautiful', 'One Thing' and 'Na Na Na'.

WATCH: Are You One Direction's Biggest Fan? Entertainmentwise Meets Them Ahead Of Their iTunes Festival GigWATCH: Are You One Direction's Biggest Fan? Entertainmentwise Meets Them Ahead Of Their iTunes Festival Gig

The band sent fans wild (Wenn)

They also gave fans a treat when they performed covers of 'Valerie' by The Zutons, Natalie Imbruglia’s 'Torn' and 'Use Somebody' by Kings Of Leon.

Yesterday (September 20), One Direction were forced to bring forward the release of their new single and music video for 'Live While We're Young' after a poor-quality version was leaked online illegally.

One Direction - 'Live While We're Young':

One Direction Live At The iTunes Festival

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