5 Seconds of Summer recently gave some California fans the surprise of a lifetime.
The Hollywood Reporter reports the guys showed up and personally sold tickets to fans Saturday morning for an upcoming concert at 5 Seconds of Summer will play to roughly 17,500 fans when it headlines at The Forum in Inglewood, California.
The Australian group is gearing up for its first U.S. headlining concert on Nov. 15.
Before heading into the box office, drummer Ashton Irwin, 20, said his only concern was the group's money handling skills. "We might lose track of a lot of coins and stuff like that. But we'll work it out. We'll get through it," he joked.
Many of the unsuspecting fans camped out overnight in line for tickets and it proved to be worth it all.
"I can't speak right now. I'm too overwhelmed," 13-year-old Trina Umana said through tears of joy after purchasing her tickets from guitarist Michael Clifford, 18.
The quartet, which also includes lead vocalist and guitarist Luke Hemmings, 18, and bassist Calum Hood, 18, said they can share some of their fans' sentiments.
"We're more awkward than anything," said Irwin of meeting artists he admires like Fall Out Boy bassist Pete Wentz. "But inside, when they leave, we sort of squeal."
The band also credits Green Day, Blink-182 and Imagine Dragons as their musical influences.
5SOS also rocked the crowd with a live, outdoor performance of their hits "She Looks So Perfect" and "Amnesia."
5 Seconds of Summer will play to roughly 17,500 fans when it headlines at The Forum.
The band is currently opening for One Direction on the "Where We Are" tour.
5SOS's self-titled debut album was released last week. Billboard predicts it will debut at No. 1.
