Harry Styles thinks "it's worrying" his vomit is being sold on eBay.

Speaking to Scott Mills on BBC Radio 1 today (29.10.14), the 20-year-old singer said: "It's worrying this is the world we live in."

Explaining what caused him to puke, he added: "I'd been on a hike. I'd been on a very long hike.

"It was about three weeks ago, so I'm fine now."

His One Direction bandmate Liam Payne added: "Woah, I saw that thing [the eBay listing], it's weird."

But the 21-year-old has his own issues to deal with, as he gets cabin fever from not being allowed to leave hotels for security reasons.

He said: "I just can't be kept inside for that long, it's just not fair. I can't deal with it. I've always been quite an outdoorsy type of person. I'm an adventurer, I like to explore."

Meanwhile, the British boyband - also comprised of Louis Tomlinson, Zayn Malik and Niall Horan - aren't worried about their private photographs ever being leaked online, as they don't use iCloud because Harry thinks "it's not a very complicated hack."

The group are gearing up to release their new album, 'Four,' next month, but haven't listened to the entire record together yet.

Zayn said: "I don't think we've quite listened to it together. We should do that."

The band are thrilled Danny DeVito agreed to appear in their latest music video.

Niall said: "He's Hollywood royalty to us, so for him to even want to be in our video was insane. It was a really good day."