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
Trololo - http://youtu.be/OJ2mftZpfGE
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