How to download free music to my iPhone?

I just got the iPhone 4. Im a teenager so obviously I like to download alot of music. But Ill go bankrupt if I had to buy all the music that I would wanna download. Is there any apps that I can download free music from? Without having to go through so much, like just download it to the phone without needing to do... show more I just got the iPhone 4. Im a teenager so obviously I like to download alot of music. But Ill go bankrupt if I had to buy all the music that I would wanna download. Is there any apps that I can download free music from? Without having to go through so much, like just download it to the phone without needing to do something on the computer.
Please leave the name of the app and the directions please (:
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