Want to buy music from Amazon.com on MySpace? Not so fastMost MySpace Music customers won't go searching for the obscure stuff. The big money is in pop hits. The industry's top 10 singles are all available to preview on MySpace Music — and they're all on Amazon.com's MP3 store as well. But that doesn't mean it's one-click easy to buy the music via MySpace. Trying to purchase downloads of 6 of the 10 directly from MySpace's new music widget failed. And those that worked required plenty of clicks and drop-down menus. [Idolator]