...as needed.

one of the things i love about C is that he will sing lather, rinse, repeat with me in the shower.

Music Mash

say there's a song you've heard, and you know the lyrics, but not the title or artist. you can go through two layers of search and visit several websites, or you can use Music Mash. it pools lyrics, sound, and video results from YouTube, Yahoo, and Rhapsody in one (kinda ugly) tabbed interface. it's my favorite so far of the stuff people have made from web services.