Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with LeBron James (R) backstage as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. AFP PHOTO / Pool / Neilson Barnard

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with LeBron James (R) backstage as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. AFP PHOTO / Pool / Neilson Barnard

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)

Britain's Prince William, left, and Kate, Duchess of Cambridge pose with Cleveland Cavaliers' LeBron James, right, backstage of an NBA basketball game between the Cavaliers and the Brooklyn Nets on Monday, Dec. 8, 2014, in New York. (AP Photo/Neilson Barnard, Pool)