Hand Balancing act from Cirque du Soleil's "Quidam," performed 由 Olga Pikhienko. And yes, I know, she sure made one heck of an entrance, didn't she? :P
The artist is Luan Leilei (I think). In this video she is about thirteen years old (I think) and she is just SENSATIONAL! Song is Stella Errans, sung 由 Erik Karol. Enjoy!