Smule has Magic Piano (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE for a limited time.

From Bruno Mars to Mozart, play the hottest songs effortlessly on the #1 piano game, now also available in HD for iPad! Get free songs every day and enjoy the largest catalog of songs in any piano app. Turn on game mode to unlock achievements and free songs, or just relax and play your favorite tunes. Join the over 10 million Magic Piano players and experience the fun of playing piano – no lessons needed!