YouMusic

With YouMusic you can stream all the audio tracks from YouTube's video through the Windows Phone integrated player.
Just reach a YouTube video page and hit play! No more need to download the mp3 to your library.

YouMusic is not a simple YouTube client or downloader. Since the music is streamed through the Windows Phone intagrated player, the stream keeps running outside the app.

If you like YouMusic, please rate it 5 stars :)