Yes, data charges might apply when you are using BBM Music if you aren't connected to a Wi-Fi network. Music and data in BBM Music are streamed over the mobile network if a Wi-Fi network isn't available.

Your data plan must support access to the BlackBerry App World storefront for you to download and use BBM Music. Some wireless service providers allow BlackBerry App World access over the Wi-Fi network and in this instance, BBM Music works over the Wi-Fi network. For additional information, contact your wireless service provider.