Unstoppable (arr. Alan Billingsley): SAB Choral Octavo

Alan Billingsley's arrangement captures the song's infectious energy while making it genuinely singable across three parts without sacrificing the pop sound students recognize. The 13-page score balances accessibility with sophistication, giving developing choirs a contemporary piece that doesn't rely on vocal gymnastics to feel powerful.

Propulsive and confident. The piece captures the defiant optimism in Sia's original while giving all three voice parts moments to lead and contribute to the overall sound. It's built for moments where a choir needs to walk off stage with the audience on its feet.

Choirs at the middle school through early high school level who want to perform current pop repertoire without abandoning musicality. Show choirs benefit particularly from this arrangement's groove and energy, though traditional concert choirs can adapt it to their style.

• Establish the rhythmic groove early in rehearsal. This arrangement thrives on precision, so lock the rhythmic vocabulary before layering harmonies.
• Balance the altos and baritones carefully in the harmonic sections. Their parts create the foundation that lets sopranos shine without overpowering.
• Consider how much you'll use the recorded accompaniment during performance. Some directors layer it underneath the full choir; others use it for rehearsal only and perform acoustically.

Pair this with contemporary pop arrangements or rock-influenced pieces to create a cohesive set that showcases your ensemble's versatility. It works especially well in concerts aimed at younger audiences or as a contrast to classical or art song programming.

• Rhythmic precision in syncopated pop idioms
• Balancing SAB harmony in contemporary contexts
• Connecting vocal technique to pop and R&B style
• Interpreting ensemble groove and ensemble energy