Marina Alexandrova, who plays the main character, probably got lingual braces during filming.
She plays a singer, and therefore there are good close-ups during the singing scenes.

https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/6ecef41353008358
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/384be61353008360
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/08559d1353008362
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/344f501353008364
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/bc2f721353008366
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/74d56c1353008368
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/3280ac1353008370
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/e020fb1353008372
https://dereferer.me/?https://dereferer.me/?http://www.imagebam.com/image/07b4ec1353008374 (without braces)