what episode that peridot sang? (it might be it could have been great xD)

^Yes, it was 'It Could Have Been Great'

^Right, I was like "oh dang he can sing!"

oh we'll meet again, don't know how, don't know when! oh we will meet again some sunny day!

I guess we're already here, I guess we already know we've all got something to fear, we've all got nowhere to go. I think you're all insane! But I guess I am, too. Anybody would be If they were stuck on Earth with you!