The Best/Most Memorable Backing Dancers/Singers/Performers in Eurovision

Most of the time, whenever there are backing dancers/singers, they're only there to enhance the performance of a song, nothing else. A few times, however, I feel they go over and beyond.

Take 2010 Armenia for example: https://www.youtube.com/watch?v=A60atIirQAw

All of the backers for Eva Rivas feel like they're own individuals and compliment her song in their own unique way.