Madison Reyes (Julie) and Charlie Gillespie (Luke) co-wrote the song "Perfect Harmony" while working on the show. The song went on to be featured in the show.
Many of the actors featured singing or playing instruments on the show are also musicians in real life.
All the episodes of the first season are named after the song that is prominently featured in said episodes
Madison Reyes (Julie) had a fan-girl moment when she met her future co-star Jeremy Shada (Reggie) during auditions because she's a huge fan of his works as Finn from Adventure Time and Lance from Voltron.