Singing can be a quite embarrassing time to have your voice crack. Your voice cracks might be in your control, or beyond your control. Luckily, this can be prevented by taking a few steps.

Steps

1. 1
   Practice singing. If you have control over your voice, you may be able to keep it from cracking. If it's really very hard, hold your stomach and sing. You want your voice to be really deep!! Practice pitch control and see if you are able to hold said pitch without letting your voice crack.
2. 2
   Actively sing. If you try to sing well, and really think about what pitches you are hitting, you may build enough control to keep yourself from breaking the pitch.
3. 3
   Ask for help. If you take lessons from an instructor, ask them if they have any tips or tricks to help your voice. They have most likely experienced this themselves, or have seen many cases of this in their teaching experience.
4. 4
   Drink water before singing. Keeping your throat moist can help you have better control over what you sing. If the cracking is caused by a dry throat, this is an easy fix. Swallow a teaspoon of olive oil.
5. 5
   Try voice exercises that help you inflate and contract your vocal chords. These exercises if practised regularly, can help you gain better control over your voice and prevent it from cracking.
6. 6
   Keep your diaphragm down at all times. If you are cracking notes, it means you're over-blowing your notes which is not good.
7. 7
   Warm ups are extremely helpful. Look up vocal warm ups on youtube, and you will find many different types, such as the classical "Do mi sol do sol mi do". Move up by either half steps or whole steps.