Wild nights are calling!
At least Julianne was wearing underwear, though — a nipple showing is way less embarrassing than someone's bare crotch!
Her boyfriend Brooks Laich didn't notice the 26-year-old's nip slip either, otherwise we're sure he would've lent a hand to cover it! Ha!
Despite the clothing glitch, Jules looked pretty fab with her t-strap pumps and tousled hair!
[Image via Ginsburg Spaly.]