Mila Kunis [1] and Ashton Kutcher [2] took a break from their parental duties and popped up at the Billboard Music Awards in Las Vegas on Sunday evening. Mila, who's been busy promoting her latest film [3], Bad Moms, dressed to the nines in a gorgeous sparkly dress and struck a handful of stunning poses alongside her costars Kathryn Hahn and Kristen Bell [4] on the pink carpet. While Ashton did not join Mila outside, he did link up with her inside, where he also met up with Mark Cuban, Kate Beckinsale [5], among other stars. Similarly, the actress posed for a series of fun pictures alongside Lucy Hale and Jessica Alba [6]. Take a look at all the stunning arrivals [7] from the night.