Who is this guy and why is he in every other google video singing ?

http://video.google.com/ThumbnailServer?contentid=eaec472835e175f1&second=5&itag=w320&urlcreated=1133548523&sigh=kOd3t-kmu2JoNTl4cwwD3wsMqn4

The comments say something about karaoke... Did he upload like 100
videos of himself singing ?