The band extended their Billboard Hot 100 chart lead on Thursday, with the track remaining in the number one spot for the second consecutive week.
Talking to MTV News, fun. frontman Nate Ruess revealed that the group never expected to have a chart-topping song despite the hard work they have put into making music over the past decade.
"It's weird. It's amazing. Actually, the last year, ever since we started making the album Some Nights, has been a daydream that has come true," Ruess explained. "I mean, in ten years of us doing this, collectively, we never thought we'd have a number one song. Probably since we were 14 years old, we realised those type of things were impossible."
Ruess continued: "We're used to being the bridesmaids, and we always wanted to be the bridesmaids, and I hope we can still continue to be the bridesmaids, it's who we are. Any of this stuff is just some sort of weird icing on a very weird-ass cake."
fun. have also had success with 'We Are Young' in Australia, where the track recently topped the ARIA singles chart.
Watch the video for fun.'s 'We Are Young', featuring Janelle Monae, below: