The European based Spotify is set to bring its music streaming service to the iPhone and iPod Touch but could face some opposition from Apple.

Spotify, which has over 6 million songs available for streaming to users of its desktop client, is looking to port the App to the iPhone and iPod Touch. However, Apple has yet to approve the streaming client. The reasoning would be Spotify’s duplicate functionality of the iPod and iTunes App but even if Apple approves its App Store entrance, legal troubles could plague the company. Popular music streaming services such as Last.fm and Pandora have all had their fare share of licensing issues in the US as the major labels demanded a cut of the profits. But if Spotify is able to survive the legal gauntlet thrown at it, the issue of pricing comes in to play. Users may either have to pay a monthly fee or put with the occasional ad.

Via Macworld