To sing higher notes, you need to learn to use your vocal cords more efficiently. This can be done by taking singing lessons and practicing regularly. You can also try the following exercises: ~Humming: Humming is a great way to warm up your voice and strengthen your vocal cords. ~Lip trills: Lip trills are another great way to warm up your voice and improve your vocal flexibility. ~Sirens: Sirens are a great way to expand your vocal range. Start by singing a low note and gradually slide up to a high note, then back down to a low note. If you are experiencing any pain or discomfort when singing, stop immediately and consult with a voice teacher or doctor.