April 18, 2012 3:20 pm Zac Efron at “The Lucky One” Premiere Zac Efron hits the green carpet for the premiere of “The Lucky One.” He chats about how happy he is for the release of his new movie, and how he stays grounded in Hollywood. US & World Videos 1:36 A student brought a gun to middle school in Hartford: police 1:45 NYPD enters Columbia University in riot gear to clear protest 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 2:04 Arrests made, camps removed during pro-Palestinian protest at UConn