What's the Big Frigin' DIFFERENCE! 5/18/2014 12:05 AM PDT BY TMZ STAFF We've sprinkled in some very subtle differences for you to spot -- after you've soaked in the Rita Ora's stunning appearance... see if you've still got the energy to find 'em! **HINT -- There are THREE differences in the above photographs!** See also Pamela Ewing in 'Dallas': 'Memba Her?!Celebrity Scramble -- Guess Who!Guess Which Singing Sensation This Little Lady Turned Into!