It’s a cover of the Cossack romance (song). Even if you don’t know Russian it’s still worth a listen just for Pelageya’s voice. I tried to find the lyrics in English but no such luck, and I’m too lazy/incompetent to translate them myself.
When I started working at the Lookglass Restaurant I had to wait three weeks to get my name tag made, but because the manager requires everyone to wear a name tag, I had to wear this one. I was Rebecca from Ukraine and a few customers laughed others kinda believed it and tried asking me what Ukraine was like.