The former Laguna Beach and The Hills star was spotted promoting her Chinese Laundry shoe collection at the trade fair in Sin City on Tuesday (20 August) and certainly looked the part in her pretty outfit - complete with a pair of electric blue heels from her own range.
Donning a simple and chic white cropped top and a matching white skirt, you'd never guess that Kristin gave birth to her first child - son Camden Jack Cutler - just last year.
Earlier this month Kristin celebrated Camden's first birthday and announced that the tiny tot - whose father is American footballer Jay Cutler - is the light of her life.
And another special part of the 26-year-old's life appears to be her dog, Bardot, who joined Kristin on her promotional run in Vegas yesterday.
Despite wearing a pristine white ensemble, Kristin showered Bardot with hugs and kisses at the trade show, making sure that her pet pooch also got a few seconds in the spotlight.
Being a working mum-of-one means that the former reality star is always on the go and this week has been no exception, as Kristin revealed that she only managed to stop in Vegas for a day.
After the trade show she tweeted: "Had a blast at Platform today...Vegas for 24 hours...just the way I like it."
It seems like those outrageous partying days are definitely behind her!
Are you a fan of Kristin's outfit? Let us know below, as the best comment each week wins £50!