Get Applause Karaoke in the App Store
Rock out to your iTunes library using your iPhone as a microphone. Sing along to any tune on your iPhone or iTouch.
Use your iPhone headphones and sing listening to your voice mixed with music. Plug your iPhone into your stereo using a cable or docking station. Hold the iPhone like a microphone and sing. Connect your device to iPhone enabled car stereo and let your passengers sing along listening to their voice through the speakers.
