Justin Bieber, Usher, Busta Rhymes, Tony Bennett perform at Rockefeller Center

Justin Bieber, Usher, Busta Rhymes, and Tony Bennett performed at the Rockefeller Center for a pre-taping of NBC's Christmas Tree Lighting event in New York.<br /><br />Follow Hollywood.TV on Facebook @<br />http://facebook.com/HollywoodAsItHappens