Open the iPod app and then click the link for "store." That's an alternative way to open iTunes. You only have to do this once. Now close the iTunes app and try to open it the regular way and check if it loads fine without crashing. If it still crashes after that, change your cookie settings. Settings > Safari > Privacy and Security > Block Cookies. If it is set to "always" change it to "from third parties and advertisers." Having it set to Always can cause iTunes to crash.