Startup Idea : Song lyric Database

I want to be able to find songs easily without having to know the title/artist. If you could just remember half a sentence from a verse in a song, you should be able to search for that in an app that has hundred thousands of song lyrics in its Database. The app should have advanced search options, without making the app itself advanced. I know there are already apps like Soundhound and Shazam. But I think they are way too complicated and something easy as this is missing. It doesn't have to be fancy with lots of special functions, just that one thing that helps people find the songs that they've been looking for. Of course there is google but I think there needs to be an app for this.