Ms Fortescue took to Instagram to show off her perfect pout recently - nude lipstick complimented by her tousled Chelsea locks.
Then, she took things one step further by slicking on some gloss and slipping in to a shirt… covered in a gorgeous lip print!
Rosie said: "Having a lips moment in my new @msgm_official shirt."
Rosie's top is from seriously fabulous Italian brand MSGM and costs, erm, quite a bit.
So we may have to stick to daubing lippie on an old white shirt for now.
The Made In Chelsea star has been on a bit of a shopping spree of late.
She popped in to Victoria's Secret on Friday (1 August) and grabbed herself a bikini for the summer months.
Then, as pleased as punch with her sunny purchase, Rosie popped her new bikini on a London letter box and took a picture of it.
Because, of course!
She said: "My #VSTeenyBikini is loving London today @victoriassecret!"
Hmm. Maybs run it through a delicate wash before you wear it, Rosie!
Meanwhile, Made In Chelsea: New York is hitting our screens super soon and we CAN NOT WAIT to see the Chelsea lovelies posh it up in the Big Apple.
Will you be making like Rosie and matching your top to your pout this weekend? Tell us below, as the best comment from across the website each week wins £50!
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