Somehow is it possible to stream music directly from iphone using Airport Express?

Hi all,
I’ve recently bought an Airport Express device in the hope that I could plug them on my powered speakers and stream my Iphone music (without using itunes with it). I read some posts of people saying it’s possible to do it using Pandora app but there isn’t an easier way to simply connect to the Airport Express Wi-Fi network and play music’s on IPhone Library ?
Thanks in advance.

Not without iTunes but should you decide to use iTunes here you go. Using AirPlay

Airplay doesn't need iTunes. It also depends on the App. For example the Napster App has airplay so I can stream to my Airport Expresses and the Apple TV as well. The iPod app definitely will let you use Airplay to go to an Express.