That is so cool, but I'd like to know how they got their voices to singing...'cuz they really do sound like the people they represent.
Auto-tune; "Auto-Tune was initially created by Andy Hildebrand, an engineer working for Exxon. Hildebrand developed methods for interpreting seismic data and subsequently realized that the technology could be used to detect, analyze, and modify the pitch in audio files"
It sort of snuck into the music industry as a cheat for lazy singers. Cher was the first person (I think) to deliberately use it in a song (Do you believe).
The guys at schmoyoho have gone one step further and created an app for your smart phone where you can songify any speech.