Original song by Stabbing Westward. Sadly there's no instrumental version, so I had to work around the original singer. Great song though.
Lyrics:
You warned me once that every time I hurt you
Another piece of you'd grow numb inside
If I hurt you once too often
You'd feel nothing
God I wish I could undo and turn back time
Control Z cannot undo what's torn apart
Control Z cannot undo your broken heart
Control Z cannot forget all the anger and regret
Control Z cannot undo your broken heart
I'd take back every word I left unspoken
And tell you all the things I was too afraid to say
I'd cherish every moment we're together
These are wasted promises I've made today
Control Z cannot undo what's torn apart
Control Z cannot undo your broken heart
Control Z cannot forget all the anger and regret
Control Z cannot undo your broken heart
Control Z
I wish I could undo and start this over
I wish I could undo and turn back time
Control Z cannot undo what's torn apart
Control Z cannot undo your broken heart
Control Z cannot forget all the anger and regret
Control Z cannot undo your broken heart
Control Z cannot forget all the anger and regret
Control Z cannot undo your broken heart
Control Z
...
https://www.youtube.com/watch?v=G7B_kB_PRoE