The specific requirements for obtaining a license to perform copyrighted music will vary depending on the musical and the publisher. In some cases, a single license may be sufficient to cover all of the songs in a musical. In other cases, a separate license may be required for each song.
The best way to determine whether a license is required and how to obtain one is to contact the publisher of the musical. The publisher will be able to provide you with information on the licensing requirements and fees, as well as the process for obtaining a license.
It is important to note that performing copyrighted music without a license can have serious consequences, including legal action and fines. Therefore, it is always best to err on the side of caution and obtain a license before performing any copyrighted music.