5 Seconds of Summer just kicked off their first headlining tour, and they debuted a new song called “Permanent Vacation” during their show in Lisbon, Portugal! The guys are on their Rock Out With Your Socks Out tour — and we’re pretty pumped that they gave us such an epic surprise on their very first night.

And, of course, it’s endlessly catchy. We don’t know if it’s going to be on their next album, but we definitely wouldn’t mind!

It seems like 5SOS is really enjoying being on the road again too. It’s impressive that they’re still writing new stuff when their schedules are so busy.

PORTUGAL, you were wonderful ! Great start to the tour, let the good times roll !

A photo posted by 5 Seconds of Summer (@5sos) on

Do you like “Permanent Vacation”? Tell us in the comments!