Continuity mistake: Mina Hoyt's bra strap before the vault was a white strap. After she completed the vault, the bra strap changed to hot pink. (01:19:05 - 01:20:00)
Continuity mistake: In the scene where Haley is sitting in the bathtub full of ice, she is wearing a black sports bra. The shot then switches to some of the girls watching a news report from the Worlds competition. It then switches back to Haley, who is now wearing a gray sports bra.
Continuity mistake: While Tricia Skilken is competing in the Beam finals, Wei Wei's position on the bench changes. While the shot is on Haley, Joanne and Wei Wei, they are sitting in that order (from left to right). When the camera's focus shifts to Tricia on the beam, Wei Wei is sitting on the left (you can tell by the leotard colors).
Answer: It's called We Run This by Missy Elliot.