Barclays Center had its official opening over the weekend and kicked off with Jay Z coming full circle and performing a concert in a venue he helped build just minutes from his modest Brooklyn beginnings. Of course the stars were in the building, check out photos from nights one and two featuring Knicks Tyson Chandler and Carmelo Anthony, Lala, Nets Deron Williams, Magic Johnson, Giants WR Victor Cruz, UK basketball head coach, John Calipari and more.