The melanin in Chloe's hair is decreasing. Melanin is a substance in our hair, skin, and eyes that determines pigment. If Chloe has more melanin in her hair, her hair will be darker; if Chloe has less melanin in her hair, her hair will be lighter.
You didn't put any answers, but I do know it is polite to greet the persons as they come on stage, and clap or cheer when they finish a song. It is also a good idea to put any electronic devices in sleep mode or simply turn them off.