This was no "flash mob".
It was heavily practised and coordinated, probably rehearsed many times before that performance.

Students majoring in dance and choreography, travel expenses paid for, political advert for Putin.

the title is "Tsekalo and Puttin' on Sparrow Hills". It was been staged by Alexander Tsekalo, a well-known actor and producer.
This fabulous performance was unfortunately politicized at 5:11 and 5:16 into the video, when the woman in the wedding dress, and the crowd sing, instead of "Puttin' on the Ritz" - "Putin malodets"

Thread title is misleading.

It was very much fun to watch and thank you for sharing this with up OP

Others are right that this was highly choreographed and coordinated and planned but that doesn't disqualify it as a flash mob. Just a high budget flash mob.

Whether or not this has anything to do with Putin I don't know, but I think American politicians would have a lot more approval if this kind of thing happened on their dime.

Too bad 2/3 of the people there were the performers themselves... Kinda takes away the idea of a flash mob.

I'm reactivating because this is too good to miss.