The girls narrowed it down. Raquelle was the obvious choice—she was desperate to have her dance troupe take the headlining slot. Then there was Kevin, who had been acting strangely quiet, and the new transfer student, Leo, who played a green bass guitar.

Using Tia’s tech skills, they tracked a faint GPS signal from Barbie’s "lucky" keychain attached to the guitar case. The signal led them not to Raquelle’s house, but back to the school basement.

With the diary returned and the lyrics intact, Barbie invited Kevin and Leo to join Charmz on stage. The Spring Jam was a hit, proving that while secrets can cause a mystery, honesty makes the best music.

There, they found the "mystery" wasn't about malice, but stage fright. They discovered Kevin and Leo hidden away; Kevin had "borrowed" the diary to add a secret rap verse he was too nervous to show Barbie, and the guitar had been moved by the stage crew (wearing blue paint) for a surprise tuning service. However, the neon green pick belonged to Raquelle, who had tried to hide the diary to stall the show, only for Kevin to accidentally "save" it first.