“You want a hit? Give me an hour, plus a pen and a pad.” That was LL Cool J back in ’87. Things have changed since then — especially when it comes to hits. For Rihanna, hits take well under an hour to construct. Proof: her 2012 chart-topping song “Diamonds” took only 14 minutes to write — according to the song’s writer, Sia Furler. Hit the jump for more info.