@niallhxranbun got that one. It was Since U Been Gone by Kelly Clarkson

The Next one is,

  I'm not a perfect person
There's many things I wish I didn't do
But I continue learning
I never meant to do those things to you
And so I have to say before I go
That I just want you to know

I've found a reason for me
To change who I used to be
A reason to start over new
and ___ ______ is you

I'm sorry that I hurt you
It's something I must live with everyday
And all the pain I put you through
I wish that I could take it all away
And be the one who catches all your tears
Thats why I need you to hear

I've found a reason for me
To change who I used to be
A reason to start over new
and ___ ______ is You

and ___ ______ is You [x3]