so heres Michael's guitar solo that happens periodically throughout the song :)
[ Tab from: http://www.guitaretab.com/numeric/5-seconds-of-summer/348927.html ]
e|--------------------------------------------------------------------------|
B|--------------------------------------------------------------------------|
G|--------------------------------------------------------------------------|
D|--------------------------------------------------------------------------|
A|-5-5-5-5-5---6-6-6-5------------------------------------------------------|
E|-----------6--------------------------------------------------------------|
if using version 3 chords just switch 5th fret to 8th and 6th fret to 9th :)
enjoy :)