Enter StreamDrag, a simple music search engine that draws its collection from YouTube's massive database, although it's not really transparent - or important - to the end user, who doesn't see the video at all, he just listens to the song. Titles of songs such as "Tool - Sober (HQ Fullscreen)" can be a bit misleading, but it's a minor point as long as you're in it just to hear the music.
A nice option is the playlist; stack a bunch of tracks together and you've got yourself a party. This can be done in YouTube and other third party tools, but it's extremely simple in StreamDrag; click on the "+" icon next to the song and it's added to the playlist (to return to the search results, just click on "playlist" again). Everything else on the site is very straightforward: you've got play/pause, stop, rwd and ffwd buttons, as well as a repeat and sound on/off switches. I like it: by removing everything else and focusing on the music, StreamDrag is actually much more enjoyable (and faster) to use than many other similar services (including YouTube itself).