This is the simplest way I found to play this song:)
Intro/Verse/Chorus
[ Tab from: https://www.guitartabs.cc/tabs/j/justin_bieber/be_alright_tab.html ]
e|------------------------------------------------|
b|------------------------------------------------|
g|-------------7--7-------9----9--------5---5-----|
d|---5--5------7--7-------9----9--------5---5-----|
a|---5--5---5-----5----7-------7-----3------3-----|
E|-3----3-----------------------------------------|
Bridge (2x)
e|------------------------------------------------|
b|------------------------------------------------|
g|-------------5--5-------------------------------|
d|---7--7------5--5-------5----5---------5---5----|
a|---7--7---3-----3-------5----5---------5---5----|
E|-5----5--------------3-------3-----3-------3----|
