Song Info by First Option Solutions Ltd.
Simply put, this app allows you to look up information about the song that is currently playing on the iPhone (or iPod touch). This includes the lyrics, the song’s meaning and the video. But you can also looks up reviews of the album, go to the singer’s MySpace page, or see if there are any autographed photos of them on ebay. All the information you could possibly want on that song, album and artist are available with just a few taps.
Developer Website: http://songinfo.co.uk