Of course, the coolest kids in town, Will Smith's daughter Willow and son Jaden, were at the gig. 12-year-old Jaden even rapped onstage during Justin's performance of "Never Say Never," a song from his hit movie, "The Karate Kid." Kevin Mazur/WireImage.com - August 31, 2010
Justin Bieber's Big Night
The singer welcomes celebrity guests for a concert at NYC's Madison Square Garden.