If you're a user of digital editing software Audacity, you already know you can do a ton of cool things. One of the cooler things you can do is changing a guy's voice to sound like a woman's. This is done with pitch control, or autotune, and will like you modify the voice by a number of octaves. I this video, rock band 30 seconds to Mars is made to sound like Avril Lavigne. Check it out! Of course, this can also be done with your own voice too!