CocoLyrics.com has a huge database of lyrics.

• Search songs by keywords inside the lyrics or by artist name.
• Share music lyrics on the web.
• Tight integration with the Android music player.
• When the song change it automatically download the lyrics and notifies you in the top bar.
• To disable music player integration just press menu and go to "preferences."
• Quickly browse all artists by name. Once you click in one artist it will show all song lyrics in a list.
• Another cool feature is the 'Top Lyrics' button, where you can see the top songs that people have been bookmarking in the past day.
• Bookmark songs and have them handy for later.
• Also comment on song lyrics and rate your favorite ones.
• Lyrics for all music tastes including Rock, Pop, Country, Hip-Hop music.