Why is it so hard to find a good shojo manga about music?
BB EXPLOSION (Hajikete Bi Bi). by Yasue Imai. First published in 1997 and first published in North America in 2004.
PLOT:
Airi is a small-town girl from Okinawa whose greatest joy is watching Boom Boom, a variety show featuring the star students of a local acting school. She gets her own chance at stardom when the school holds open auditions. Soon enough, Airi is working alongside some of the best students at the school and well on her way to becoming the star she always dreamed of becoming...so long as she can overcome her father's objections and her own doubts.