YouTube Birthday Karaoke Night

To celebrate YouTube's ninth birthday this May, we invited some of our favorite performers to star in a mashup of memorable musical moments from the past nine years. Watch the behind-the-scenes here: http://youtu.be/m4cQF8gWYCI FEATURING The Gregory Brothers: http://www.youtube.com/schmoyoho Chester See http://youtube.com/chestersee Cimorelli http://www.youtube.com/cimorellitheband Steve Kardynal http://www.youtube.com/SteveKardynal Tay Zonday http://www.youtube.com/TayZonday Mystery Guitar Man http://www.youtube.com/MysteryGuitarMan Madilyn Bailey http://www.youtube.com/MadilynBailey David Choi http://www.youtube.com/davidchoimusic Marie Digby http://www.youtube.com/MarieDigby Alex G http://www.youtube.com/AlexGMusic7 Timothy DeLaGhetto http://www.youtube.com/TimothyDeLaGhetto2 MUSIC Chocolate Rain - http://youtu.be/EwTZ2xpQwpA Bed Intruder Song - http://youtu.be/hMtZfW2z9dw Here It Goes Again - http://youtu.be/dTAAsCNK7RA Friday - http://youtu.be/kfVsfOSbJY0 Call Me Maybe - http://youtu.be/fWNaR-rxAic Cups (When I'm Gone) - http://youtu.be/cmSbXsFE3l8 Gangnam Style - http://youtu.be/9bZkp7q19f0 Mix by The Gregory Brothers - http://www.youtube.com/thegregorybrothers Credits featuring Nyan Cat - http://www.nyan.cat/ Video created by YouTube & Portal A - http://portal-a.com