The song The Hardest Part is performed by Good Riddance .
I used to think you were on my side
We never found a place to hide
I let it go on too long like so many times before
I don't know where I should start
It seems like the hardest part
To take your pretty world and tear it all apart
Let it go I can't fix you anymore
Let it go time to be stronger than before
Let me go crying all the time
Let it go and trust me
Iæ¦ not worth your waste of time
For the sake of sanity
Letæ¯ erase those memories
Thereæ¯ nothing left here that will take the pain away
Thereæ¯ no more mystery
Just too much history
Someday you'll understand it's really for the best
Connection rejection
Your tears won't carry me away
Completely forget me just let it go now
Itæ¯ time to move on