Is it possible for a singer to shatter A glass with there voice?

It is possible, but very difficult. In order to shatter a glass with your voice, you would need to produce a sound wave that is both powerful enough and has the right frequency to resonate with the glass. The most likely way to do this would be to sing a note that is close to the glass's natural resonant frequency. This would cause the glass to vibrate sympathetically, and if the vibrations are strong enough, the glass could shatter.

However, it is important to note that this is not something that can be done easily. Even professional singers with powerful voices would have difficulty shattering a glass with their voice alone. It would likely take a combination of factors, such as a powerful voice, a glass that is particularly susceptible to shattering, and the right environment, in order to make it happen.