Usher, Kylie Jenner, Jaden Smith, Kiernan Shipka, and lots of other Beliebers hit the premiere of Justin Bieber's Believe; Lea Michele and Leona Lewis make appearances at "The X Factor" Season 3 Finale Show; Joe Maganiello celebrates his January 2014 cover of Muscle & Fitness magazine—catch up on Wednesday's top happenings in this edition of Last Night's Parties.