What does Justin Bieber sing about in his songs. :D

one time- all girls
one less lonley girl- about putting girls first in a relationship
baby- about his first crush.
down to earth- his parents recent divorce
never let you go- i think janay ruiz?
where are you now- jeremey bieber his dad
common dinominater- caitlin beadles
stuck in the moment- shahnaz alamgir
up- janay ruiz
kiss and tell- idk?

thats all i know, hope this helps!