It's hard to see but those lights are hanging from the tree. They keep changing so it looks like rain. Very cool. They also come in rainbow.
Here is Makenzie's gangnan style dancing debut in China! If you look REALLY close you can see her in the back row between the two guys who look like they actually know the dance. She has on a cowboy hat and white skirt. This is the end of the dance and shows the fireworks that the dancers weren't expecting.