[Paul F]

Indeed, an impressive performance. But also a great deal of clever editing and sound sweetening to solcite the dramatic effect. What you saw in that sequence is likely not nearly what really happened in terms of audience and judge reactions.

For example, look at 1:56 into the scene. It's a reaction shot of the female judge, just before the girl in the audience jumps to her feet. You hear the audience roar, yet if you look at the audience in the background, the audience is just sitting there.