So I was logged in to zune.net and just searched for a tiesto tune and clicked “More from Bing”

By the way did you know that zune has a web player that you can listen to all the worlds music in your browser.

Anyway in Bing a new world of music discovery opened up.

just holding the mouse over a video starts a preview of it so no need to go in to youtube before you have found the correct one.