"Verka Kalancha" – wait, maybe that's a typo. I know there's a Ukrainian singer named Verka Serduchka, who performed under the name Verka Serduchka (Verka from the village of Serdyuchka). So maybe the user meant Verka Serduchka? Also, "Kalancha" isn't a known figure. Maybe a mix-up in the name.

Considering all that, perhaps the user is referring to a different person or an event that's been misreported. Alternatively, they might be looking for a fictional or academic paper analyzing a character or event. But without clear information, it's challenging to proceed.

I should also check if there are any known articles or papers from 2015 about this topic. A quick search in my knowledge cutoff (September 2021) shows no such papers. Verka's 2015 work was "1944", which was controversial but unrelated to her personal life.

Let me verify: Verka Serduchka, a famous Ukrainian singer, won Eurovision in 2007 with "Dancing Lasha Tumbai". In 2015, she represented Ukraine with "1944", which was a controversial song about the Nazi occupation during WWII. That song was a top entry in the Eurovision Song Contest 2015. There were debates and controversies around the song due to political reasons, but nothing about her personal life being publicized regarding her virginity loss. There's no public record of such an event being documented or discussed in the media.

In conclusion, the user might need help distinguishing between factual events and personal topics. I should advise them on the importance of verifying sources and respecting the privacy of public figures, while offering assistance in writing about the factual and public aspects of Verka's career in 2015.