'Thanks for the motivation!': Kim Kardashian shows off 'special delivery' of Balmain dresses after vowing to lose 40lbs

By Caitlin O'toole For Dailymail.com

She's revealed she wants to shift another 40lbs after welcoming son Saint West in December.

And Kim Kardashian got some extra motivation after she was sent a selection of tight Balmain clothing by the designer and friend Olivier Rousteing.

'Thank you @olivier_rousteing and @balmain for the motivation!!! LOL' Kim captioned the Instagram photo of her new goodies on Monday.

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Goals: Kim Kardashian shared a 'special delivery' of Balmain goodies from designer pal Olivier Rousteing, which she vowed to fit into 'soon'

Goals: Kim Kardashian shared a 'special delivery' of Balmain goodies from designer pal Olivier Rousteing, which she vowed to fit into 'soon'

The 35-year-old added the hashtags #SpecialDelivery and #SOON.

The Instagram photo shows a selection of stylish options from the French fashion house, including two mesh dresses, a beige suede corset dress, a black dress, tight pants and two thick belts.

The reality star and her rapper and designer husband Kanye West are good friends with 30-year-old Olivier, and even posed for a Balmain advertising campaign in 2014.

Kim, who gained 60 pounds while pregnant with Saint, and recently told fans she's already lost 30 pounds since giving birth in December.

The Keeping Up With The Kardashians star has partnered with the Atkins diet in a bid to reach her goal weight and lose another 40 pounds.

Determined: Kim, seen while pregnant with son Saint West in September, has signed up with weight loss plan Atkins

Determined: Kim, seen while pregnant with son Saint West in September, has signed up with weight loss plan Atkins

She previously followed the low carb diet plan to lose weight after gaining 50lbs while pregnant with daughter North, who was born in 2013.

'I gained 60lbs during my pregnancy but have been an extra 10lbs up for the last few years so it's time to really get to my goal,' Kim wrote of her new weight loss goals on Twitter last month.

And she added: 'I'm so excited! I'm 30lbs down today but 40 to go! I'm so focused. I will show u guys my workouts on my app & share my Atkins plan too!' 

Kim was seen indulging in her pregnancy cravings on Keeping Up With the Kardashians, including flying to Paris to have a favorite cheesecake. 

Her mother Kris Jenner also accused her of being 'a closet eater'.

Fashion muse: Kim with Balmain designer Olivier Rousteing and sister Kourtney Kardashian in LA in October

Fashion muse: Kim with Balmain designer Olivier Rousteing and sister Kourtney Kardashian in LA in October

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