Which Two 5 Seconds of Summer Members Used to be Frenemies?!

5 Seconds of Summer are escorted by police as they head out of the Y100 studios on Sunday afternoon (October 5) in Miami, Fla.

The guys – Michael Clifford, Ashton Irwin, Luke Hemmings, and Calum Hood – stopped to pose for photos with some fans.

PHOTOS: Check out the latest pics of 5 Seconds of Summer

Did you know that Luke and Michael used to not get along?!

“We actually hated each other for a solid year of my life,” Luke revealed in a recent interview (via People). Then they made up and became friends as they bonded over their love for Green Day!