And in order to do that, launch Amarok, go to Tools --> Script Manager. At the bottom of Script Manager, click on Get More Scripts (the button with the star icon). On the right hand side of Amarok Add-On Installer is a search box, type shoutcast
and hit Enter. You should get one result - SHOUTcast service. Click install on the right hand side of the item. Restart Amarok.
Again, go to the Script Manager and enable the service, and it should be good to go!
Thanks for the tip, coffeetime