视频中的这首歌是叫什么名字？知道的告诉下 感激不尽

她们是翻唱Demi Lovato的《Here we go again》，出自专辑：Here We Go Again

百度可以搜到原唱，歌词如下：
I'll throw all of your stuff away
Then I'll clear you right out of my head
I'll tear you right off my heart
And ignore all your messages
I'll tell everyone we are through
Cause I'm so much better without you
But it's just another petty lie
'Cause I break down
Every time you come around
Oh, oh
So how did you get here under my skin?
Swore that I'd never let you back in
Should've known better
Been trying to let you go
'Cause here we go, go, go again
Hard as I try, I know I can't quit
Something about you is so addictive
We're falling together
You think that by now, I'd know
'Cause here we go, go, go again

You never know what you want
And you never say what you mean
But I start to go insane
Every time that you look at me