Kim Yeo-hui covering Beyonce's 'Irreplaceable' with 3 iPhones

Talented, creative and cute. The concept of using computers to make music is not new but the increasing use of mobile phones has made it more practical and portable. For a few dollars everyone can have an instrument in their hands and though the apps. don't yet have the range of expression of traditional instruments, it's going to be interesting to see how people put them to use.