《PTX LOVE AGAIN》的詞曲由歌手Katy Perry演唱，以下是部分歌詞：
I'm sorry, I'm sorry, I'm sorry, I can't do this alone.
I need you here to help me through the nights.
'Cause you don't love me now,
It's such a bitter pill to swallow.
And I know you don't want me around anymore.
I need your love again, oh I do.
But not like before, no, not like before.
I need your love again, oh I do.
This time I'll let it guide me through.
'Cause I know I've been a fool.
And I've been making the same mistakes.
But now I'm feeling so whole.
And I won't let you slip away.
I need your love again, oh I do.
Oh oh oh oh oh oh oh.
Oh oh oh oh oh oh oh.
Oh oh oh oh oh oh oh.
I need your love again.
There were times when I thought it was over,
But now we're here together, together.
You and me, just the two of us.
Now we're here forever and ever.
I need your love again, oh I do.
But not like before, no, not like before.
I need your love again, oh I do.
This time I won't be holding back again.
Out of my misery, you and I can thrive.
Take a chance, we might fall at first.
But with the taste of happiness on our lips once more.
This time I know we won't let go.
We won't let go.
(I need your love again) I need your love again.