Exciting times for 5SOS

5 Seconds of Summer

They are playing sold-out stadium shows on a worldwide tour with One Direction and have built up a global following that numbers in the millions.

And for Australian pop-punk band 5 Seconds of Summer, all this success has happened before they have even released their first album.

But after a lengthy process - that has seen them collaborate with their idols Joel and Benji Madden and record tracks in a Los Angeles studio - the Sydney teens could not be more excited that their debut self-titled LP will be released tomorrow.

"It's been such a journey to get to this point - it has been two years in the making so it is cool to see it finally coming out," lead guitarist Michael Clifford told Access All Areas from Amsterdam, where they are supporting One Direction on the UK band's Where We Are tour.

Lead vocalist Luke Hemmings added: "I think the album is a good description of who we are and the music we make. We have been through lots since we started writing it."

The Sydney foursome - which also includes bassist Calum Hood and drummer Ashton Irwin - certainly could not have been prepared for the kind of widespread hysteria they have garnered since their hit single She Looks So Perfect went to No. 1 in more than 40 countries.

They admit they are still floored by the hordes of fans screaming their names in cities they have never been to before - as was the case in Europe this week.

"There were people waiting at the airport for us, it was really cool," Hemmings said. "When we left I was like 'I don't know if anyone likes our band in Amsterdam'."

Another pinch-me moment for the boys was their first meeting with the Madden Brothers, who penned their latest single Amnesia and became a "big brother band" to the young performers.

Clifford said it was a "huge moment" to meet the rockers behind his favourite act Good Charlotte.

"They were the reason I got into playing guitar and doing the whole music thing," the 18-year-old said.

"We were all a bit nervous going in to meet them but they were just really cool dudes. They lived in Australia for a bit so they got us."

With their current supporting gigs in Europe and the US stretching until late October, the band's travels are providing plenty of inspiration for them to channel into new music and they are also hatching plans for a solo world tour after a string of Australian shows, including a sold- out gig in Perth, last month.

"We want to do our own tour at the end of the year or next year," Hemmings said. "We haven't done a full-on massive tour before and we want to do a long one."