When it comes to describing a concert or show that features an abundance of musical performances, "wall to wall musicals" is a common phrase. However, there are a few synonyms to use that convey a similar meaning. "Musical extravaganza" suggests a grand and impressive spectacle of music performances. "Song-filled event" conveys a sense of a concert or show where music is king and dominates the scene. "Melodic bonanza" is another option that may work, denoting a large amount of music, possibly with a sense of excitement and anticipation. Ultimately, all these phrases provide a similar idea of a music event filled with captivating performances and sound.