Do anyone, American or not, want to USE iHeartRadio in another country?
Fortunately, you can, but it's a little harder to do so.
Step 1: You Will Need:
Hard way: Android or iOS device and access to Wifi, and a few other things to do
Step 2: How to Get IHeartRadio Outside of the US
The easy way is to use any kind of Windows device, where you will only need to screw with the Windows OS. Simply connect to Wifi or Data (on a phone or tablet) switch your region to USA while signed in with your Microsoft account, and search for iHeartRadio in the Store. It's a free app. Download it.
Getting it on an iOS or Android is harder. Connect to Data or Wifi, and then go screw with your Apple/Google account. Switch your region to US, as well as remove your billing address and any existing credit card. If you have redeemed iTunes or Play cards, I'm not sure what would happen to your credit. Finally, go search for the free app, and download.