Kim Kardashian was feeling nostalgic on Tuesday when she shared a heartfelt message with fans on Instagram. The SKIMS founder, 40, wanted to pay tribute to someone very special and took to social media to do it. MORE: Kim Kardashian suffers Christmas home disaster with four kidsKim - whose marriage to Kanye West is rumoured to be coming to an end - wished her BFF, Allison Statter, a happy 40th and penned an emotional message to her. WATCH: Kim Kardashian breaks silence on Kanye West's