Leo's heart on his lapel
Leonardo's wearing the Amnesty Intertational heart shaped pin on his Armani tux. I know because I stood next to Leo and Cameron Diaz in the lobby of the Kodak Theatre before the show started. And Cam noticed it. Ken Sunshine, Leos pub, told me that everyone from the film has them on. The cool thing is that there is an empty spot where you would expect to see a diamond.