Rihanna At The Met: Tuxedo Trendsetter (PHOTOS)

Rihanna stepped back into the spotlight at Monday night's Met Costume Institute Gala wearing a puffy-shouldered tuxedo.

Twiggy, Lake Bell, and Lauren Bush followed suit. See below.

See the Costume Institute Gala's best-dressed, worst-dressed and Madonna here.

Or see what the men wore here.

*Follow Huffington Post Style on Twitter and become a fan of Huffington Post Style on Facebook*