One Direction heartthrob Niall Horan has revealed that he sometimes suffers from claustrophobia.

The Irish superstar, who is currently enjoying fame all around the world, explained that he can get very stressed out when he's in large groups of people and especially when he gets mobbed or fans crowd around:

"I'm quite claustrophobic and I don't like everyone crowding around and shouting the same questions. I get a little bit scared sometimes. It's all good as we've got a good security team."

Back in 2011, Horan enjoyed some down time in New York City but fans discovered his location and soon swarmed him and fellow One Direction member Liam Payne. Following the ordeal, the 'What Makes You Beautiful' hitmaker took to his official Twitter page and wrote: "This is a complete joke. Ridic. Day off, wana chill."

Earlier this week, the blond singer told We Love Pop magazine that the dynamic between the lads is great and they're at the point now where if they annoy each other it can be discussed without any drama: "We've got to the stage now where we know each other's boundaries. If there's an argument, it's over what's on the radio, or, 'Turn up the window, it's freezing'."

Watch footage of One Direction's Madame Tussauds waxwork sculpting session here: