Turn your Android device into a real karaoke machine with the Sing Karaoke app by Smule. Just like a real karaoke machine, the app lets you sing your favorite songs as you follow the lyrics on your screen. You hear the song's melody while you are singing, and you can get even better sound quality by using headphones.

When you register for the app, you will receive access to a wide array of well-known songs along with one free song download. If your musical tastes are a little more underground, the app features a selection of less popular songs that did not quite make it in mainstream music circles.