Kendall & Kylie Jenner Sing Bieber at 'Breaking Dawn' Premiere | On Air With Ryan Seacrest

"SUBSCRIBE: http://full.sc/UBDdWt To get into the holiday spirit Kendal & Kylie Jenner sang Justin Bieber's ""Mistletoe"" with celebrities walking the carpet at the red carpet world premiere of ""The Twilight Saga: Breaking Dawn - Part 1."" On Air with Ryan Seacrest on YouTube The official home for video from On Air with Ryan Seacrest and RyanSeacrest.com. Subscribe now for exclusive celebrity interviews, music performances, and entertainment news from American Idol and American Top 40 host Ryan Seacrest. Connect with On Air with Ryan Seacrest: Follow us on Twitter: http://full.sc/UBCFQd Like us on Facebook: http://full.sc/UBDI2H Follow us on Instagram: http://full.sc/UBCMeH Follow us on Tumblr: http://full.sc/UBCN27 Connect with Ryan: Follow Ryan on Twitter: http://full.sc/RGO2cv Subscribe to Ryan on Facebook: http://full.sc/RGNW4M Follow Ryan on Instagram: http://full.sc/RGO9Vy Follow Ryan on Pinterest: http://full.sc/UBD05o Visit Ryan's Website: http://full.sc/RGObNj Check out the Ryan Seacrest Foundation: http://full.sc/RGOt6T Kendall & Kylie Jenner Sing Bieber at 'Breaking Dawn' Premiere | On Air With Ryan Seacrest    / ryanseacrest   "