Troian, 25, wore a whimsical Maria Lucia Hohan dress.
Shay, 24, hit all the right notes in red — she wore a DKNY skirt and top, Jimmy Choo “Tube” clutch, AS by Anna Sheffield jewels, and Giuseppe Zanotti heels.
After the event, Shay headed out to dinner with other costar Ashley Benson. “Dinner and laughs with @AshBenzo @NotoriousCoco , @MatrixMel & @heyfanaye who does the BEST beyonce impressions… Lol my cheeks hurt!” she tweeted.
10+ pics inside…