If ever there was a case for believing in lust at first sight, this is it. Ever since we spotted her on the shoulder of Rosie Huntington-Whiteley looking effortless chic, sleek and minimal, with just the right amount of hardware, we were officially into the Saint Laurent College Monogram bag.

If you're wondering how to style it, take note.

Keep it simple: like Jessica Alba does, offset the bag with a monochrome print.

The hard working bag is looks good dressed up as it does dressed down. For proof, note Rooney Mara

So there you have it, as they say three's a trend and we official want it.