What's The Big Frigin' DIFFERENCE? 9/14/2014 12:25 AM PDT BY TMZ STAFF We're blowing the lid off of Pharrell Williams big cover up -- and our hat's off to whoever steps up to these tricky pics and spots the hidden happy differences!**HINT -- There are THREE differences in the above photographs!** More Fun Photos David Byrne from 'The Talking Heads': 'Memba Him?!Guess Who This Silly Little Sailor Turned Into!Instagram's Best Butts -- Guess Who!