Fizy is probably the most simplistic and powerful online, browser-based music search engine with integrated music player I have seen yet. Just visit Fizy’s website, enter your favorite artist and start playing the tracks it finds. If there is a video available for the track it will play that as well.
Signing up is not necessary, but if you do you will have some extra features at your disposal like creating playlists, scrobbling tracks to Last.fm and enabling an RSS feed that keeps track of the music you have played.
Information about the website is sparse. There is a Wikipedia entry that tells us that the site was created by a couple of guys from Turkey in December 2008. About two years later in 2010 the site was blocked by the Turkish Phonographic Industry Society. It’s hard to tell if this website will have a bright future, but until then I’d say: have fun with it!