Comment 2 for bug 601535

Thank you for taking the time to report this bug and helping to make Ubuntu better. The error message suggests that the file you downloaded is corrupt (e.g. incomplete) -- could you try downloading it again?
Either way, you can only extract the contents of the archive -- but I assume that you tried to run the iTunes installer, right? This is not possible, it's an installer for Windows, not for a Linux operating system.