Check out Pandora Radio. First, test drive it.
You can do so by opening the website and typing in the name of a song or artist.
The test drive plays four or five songs; then you can decide to subscribe.
Click Continue Listening button
Type in login information
Click Listen for Free
Click Create a New Station
Type Name of song or artist. It creates a radio station of similar songs and/or artists. eg., Ms. Jill Scott.
The station gives you the option to rate the songs. It's free. Free forever.