- Tap Tap Radiation is a free iPad app in the iTunes store. I admit to getting completely caught up in this game. It's more fun and addictive than you might realize! I even sang along with it!
You can play along with a song already in the library, or create a whole new track of your own. You can even download about 30 free tracks in the app store, including songs by Pink and Lady GaGa! http://chris.pirillo.com