They looked really serious, like they were shading every model that walked by.
But it wasn't as serious as it all looked. Rih and Mary J even cracked a smile at one point.
But then they realized they were being photographed and went back to being like, "Nah."
But by the time it was all over, they gave Posen a standing ovation.
And everyone was happy, most of all Rihanna and her prom date, Zac Posen.
All Images: Chelsea Lauren/Getty Images