Kim Kardashian and Kris Humphries may have hit up their respective bachelorette and bachelor parties in Vegas on Sunday. But the day before, K.K.'s mom Kris Jenner treated the couple to an over-the-top bridal shower, in true Keeping Up with the Kardashians style, at her Calabasas, Calif. home.

The fashionable festivities included pink party favors (no doubt excellent ones!), flowing bubbly, and a star-studded guest list that included the likes of Serena Williams, Mel B, Kim's bestie Brittny Gastineau and even Rachael Ray, who brought her 30-Minute Meals charm to the occasion by creating the signature menu.

Demi Lovato also attended and, judging by her Twitter feed, she was thrilled to toast her "big sister" Kim Kardashian. Who knew they were so close?! "Getting ready for the beautiful @KimKardashian's wedding shower!! Can't wait to see you, lady!" Lovato tweeted, later adding, "@KimKardashian I love you...."

E! News captured the affair on camera, with a video that reveals an adorable-looking Kim Kardashian in a chic, strapless pink frock, along with some cute interaction and PDA between her and Kris Humphries. Plus, there might just have been a pair of furry handcuffs (a gift, naturally) to add a bit of sexy, silly fun to the scene.

Body language expert Dr. Lillian Glass recently evaluated Kim Kardashian and Kris Humphries, imparting her stamp of approval on the legitimacy of their love. It doesn't look like the wedding shower will change that assessment!