People want you to succeed
Realize that people want you to succeed. They don’t want you to fail.
People never come to such events and hope they will have a good laugh.
The fear of failure and the fear of embarrassement will do you no good. The fear will only get you stuck in a mental cage.
Whatever you do, don’t apologize. If you mention your nervousness or apologize for any problems you think you have with your speech, you will point the audience’s attention to something they didn’t noticed.
Relax ! Everything is going according to plan !