MusGuess is a simple game where the goal is to guess all the given musicians, singers, bands, artists, etc. based on a provided image of theirs. You can choose between any popular genre, with several difficulty levels. It's simple and fun. This game is a great way to test how much of your favorite musicians you can actually recognize, but also a great way to find out about new artists.
The game uses the database of the website last.fm, which probably has the biggest database of music artist on the internet. If you like the game, you'll probably like last.fm too.