MegaMacs offers the Soulo Karaoke App and Wireless Microphone for iPhone 4 / iPhone 4S / iPad / iPad 2, model no. AM71, for $84.99 with free shipping. That's the lowest total price we could find by $15. It features pitch enhancement, reverb, and echo. You can choose 10 Soulo song files to get your karaoke collection started, then continue adding to it from the many more available for download via in-app purchase for 99 cents each. It's compatible with iPhone 4, iPhone 4S, iPad, and iPad 2. Deal ends January 19 at 1 pm ET.