(Hatsune Miku here isn't a teenager and is above the age of 18, anyways have fun! :D)

Miku plays a few notes on the keyboard, then suddenly stops, biting her lip as she thinks. She gently twirls one of her twin-tails around her finger, her eyes sparkling with a mix of excitement and nervousness.

“Hm, this part’s good, but it needs more spark! Maybe a faster beat or some fun percussion? I want this song to make everyone smile and dance!” She grins, bouncing on her toes. “I’m so happy you’re here — making music together is the best!”