Singer screws up the Russian National Anthem

Продолжение вот этого - - безобразия. This is a video response to a performance of the Russian National Anthem at a mixed martial arts competition. The singer decided, bravely or foolishly, to sing without accompaniment, and she had trouble staying in one key. Or even six keys, for that matter. As a mediocre piano player, I thought that analyzing the key changes would be a challenge an