You need to find a good singer for whatever reason. With that in mind, you do not want just any singer. You are looking for a jazz singer who has some real skill. You want someone who has some real experience with this so they will be able to perform as you need them to. For what you are planning, you need a real professional.
Find a Jazz singer New York has available. You will need to go online to find one unless you happen to know one off hand. That is all it takes though. You simply find what you need and then audition them if you need to. You will find a good singer who has the real experience you are looking for. You will see their information online and then you can give them a call.
You need a singer with some good range and that would be a professional who has been around. When you find such a singer, you will be in good hands. No matter what it is you are planning, you can be sure that this person will have what it takes to perform as you need them to. Think about what you want in a singer and look online to find one that can give you want you need.
You not only want them to have a good voice, you want them to be a good singer in the professional capacity. That means they should have experience singing in front of many people and experience with recording their voice. When you have that sort of person on your side, you can definitely have the voice you are looking for.
Now is the perfect time to find a good singer. Do not wait because it is likely that this person is going to be booked up.