Good Girls is from 5 Seconds of Summer self-titled 2014 album.
Michael talked about the song:
"It was one of the first songs that me and Ashton wrote.
We wrote it with a guy called Roy Stride, he's from
Scouting for Girls a guy called Josh Wilkinson
and a guy called George Tizzard and... Rick Astley. Roy came to us with the lyric 'good girls are bad
girls that haven't been caught' and at first it didn't strike to me."
Ashton added: "It didn't strike to him, but I was like 'Roy, you're a genius.'"