I know that Ya Ya has never appeared in any of Balala the Fairies’ live action series, but her sister has, so it's quite possible to imagine a live version of Ya Ya for this story.
On the planet Earth, Bei Bei is sitting on grass. She looks at the sky, the clouds, the sun.
"Bei Bei."
She didn't hear her sister call her. Bei Bei is in a reverie.
"Hey, Bei Bei."
Seeing that her sister doesn't answer her, Ya Ya starts to sing. Her melodious voice brings Bei Bei back to Earth.
"Oh, sister. Did you want to talk to me?"
Ya Ya stops singing before answering Bei Bei.
"Yes, but you seemed quite busy."
"Sorry. I was looking at the clouds..."
"What if we sing together?"
"Singing? Now? Don't you have anything important to tell me?"
"Yes, of course, since I came from the planet Gemini to talk to you, but it can wait a few minutes."
With these words, Ya Ya resumes the song she was singing earlier. Bei Bei sighs and sings with her. Their voices harmonize quickly and their song attracts curious people. Bei Bei is a little embarrassed, but Ya Ya doesn't care about them. She continues to sing with as much passion and intensity as before. Bei Bei, not wanting to shame her sister, keeps the rhythm. When the two girls have finished singing, everyone applauds.
"Oh! Thank you very much!" Said Bei Bei.
Ya Ya, on the other hand, smiles.