Leonardo DiCaprio: We can predict basically anything when it comes to him. Want us to prove it? Is he ever not dating a model? His signature dates are either on a Citibike, or sitting courtside at a basketball game. AND of course, he'll be wearing a hat. From his newsboy hats, to his obsession with college caps, he always has something on his head. Click through for our complete guide to this birthday boy's headgear.
[Photo via Twitter]