Music discovery app Shazam is now officially available for Windows Phone 7, just in time for the mobile operating system’s launch in many parts of the globe, including New Zealand and Australia, as well as Europe and Asia. (Windows Phone 7 devices are expected to arrive in the U.S. before the end of the year.)

Windows Phone 7 users will be able to download a free version of Shazam () from the Windows Phone Marketplace. As part of the initial launch offer, consumers will have access to unlimited tagging — the feature that identifies titles and artists for unknown tracks playing at any given moment. It will also be possible to purchase tagged tracks directly from the Zune marketplace.

“We expect the number of Shazamers to grow exponentially as new handsets built on Windows Phone OS 7.0 hit the global market,” said Alex Musil, Shazam’s vice president of product marketing, in a prepared statement.

The company has been expanding the app’s presence and taking part in a number of collaborations in order to attract a greater audience, which is currently at more than 75 million. Musil told Mashable () that the company is focused on reaching the 100 million user mark by the end of this year.

“We’re on target to achieve that, and so a big part of that is obviously being on as many platforms as possible,” he said.

Shazam has been available to Windows Mobile users since 2009 and is also on other mobile platforms, such as the iPhone (), BlackBerry () and Android (). It’s even out on the iPad, where it’s designed to encourage users to tag music heard on TV. Shazam has also formed partnerships with other services like Last.fm (), and just last month, it teamed up with cable channel SyFy for the season finales of Eureka and Warehouse 13. One can only wonder where Shazam will pop up next.