Norton Utilities comes with a program called UnErase. Although if you install the Norton Utilities, you risk overwriting the files you are trying to get back. Installing it on a different disk than your songs would be the best.
Now, I just have to ask 2 questions. First, why did you delete your songs, and second, why did you empty the trash? If it's none of my business, nevermind them, but it seems rather silly!