Niall from One Direction has said that "no-one expected" the band to be as successful as they are five years after forming.
Speaking to Scott Mills on the Radio 1 Breakfast Show, the singer said: "We always talk about it, which is a good thing. We didn't realise.
"We thought we'd do a bit in the UK and trip around a little bit.
"Things have changed. It's pretty good, there's nothing to complain about really."
He added: "I don't think you can describe it too easily but it's been amazing so far."
One Direction became a four-piece in March after Zayn left the group
Their latest single - Drag Me Down - went to number one in over 80 countries.
It broke streaming records in the UK, earning the highest first-week streams for a single in the with 2.03m plays.
Despite being the group's fourth UK number one, Niall said Drag Me Down being their most successful single yet "is pretty much a shock to us".
He said: "When we dropped the single we didn't really realise that was the reaction it was going to get.
"You bring out music and never know what it's [the reaction] going to be like, so to do it five years down the line and to have your most successful single now is pretty good."
Niall said he's never pulled a sickie to get out of commitments since being in the band
Niall said the band are lucky to be able to perform in stadiums and wouldn't be able to do so without their fans' support
Niall said the group's fans "prove how good they are day-to-day" but did say there are times when he worries about their level of dedication.
He's recently tweeted asking fans to stop chasing their tour bus on motorways.
See Niall's second tweet, external
"I never want to sound like I'm moaning," he said.
"It's dangerous. We've been chased on the motorway at 70 mph, surely that's not safe. That's why I've been saying that.
"Everyone else on the motorway as well. They're [fans] hanging out of windows and stuff like that, switching lanes... They're going fast and it's quite scary."
The group formed in 2010 after auditioning on the X Factor as solo acts
During the interview, Niall also explained how he doesn't read much of the press about the group.
"There's no point," he said.
"I read the back pages for the sport but that's about it."
Follow @BBCNewsbeat, external on Twitter, BBCNewsbeat, external on Instagram, Radio1Newsbeat, external on YouTube and you can now follow BBC_Newsbeat on Snapchat
