Five Secrets From Backstage With 5 Seconds of Summer

— -- The Australian band 5 Seconds of Summer will perform live on “Good Morning America” Friday as part of the show’s Summer Concert Series.

Although they’re currently on a U.S. tour, band members Luke Hemmings, Michael Clifford, Calum Hood and Ashton Irwin spent some time with “GMA” ahead of the big show and shared some of their backstage secrets.

Here are five things you may not have known about the heartthrobs collectively known as 5SOS.

5 Secrets of 5SOS

1. They take Doritos and popcorn with them wherever they go.

2. They’ve played for more than 1 million fans across four continents.

3. They play ping pong when they’re on the road.

4. They have 15 guitars that they use for their show.

5. They have a “dressing room guitar” –- an instrument that they keep in their dressing room. It’s the guitar from their “Amnesia” music video.