It's Rosie Huntington-Whitely so I can understand how you might approach this look with trepidation as She Who Is Ridiculously Perfect can get away with everything while the rest of us have to consider ourselves in a realistic light.
This dress ROCKS.
The front is so serene. Very gracious and quite calming with all that green.
The side? Well, have you ever seen anything sexier?
It's just the way it should be done. Subtley. Not showing off the side boob, merely showcasing it. A lot of skin, yes, but not a whole lot of boob.
Are you rethinking side boob now? You should be!