Ariel, 21, stunned in an LBD at the grand opening of KAOS Dayclub & Nightclub at Palms Casino Resort.
Her sexy ensemble left very little to the imagination while posing next to boyfriend Levi, 31.
The longtime couple also stopped by the opening of Greene St. Kitchen inside The Palms.
The Modern Family star has a history of wearing revealing outfits, both on and off the red carpet.
She went braless during a recent shopping excursion with Levi.
Ariel also wore a super short beige turtleneck dress while out and about in Los Angeles last month.
What are your thoughts on Ariel's bold style? Sound off in the comments.