The Met Gala is always the season's most talked-about fashion event, but this year, there's only one star people really wanted to see. Source: Kevin Mazur/MG26 / Getty Even after being announced at co-chair, Beyoncé's attendance at the iconic event still seemed like a question mark. But, at the eleventh hour, the 35-time Grammy winner arrived wearing a diamond-encrusted, skeleton-inspired gown by Olivier Rousteing, complete with a sparkling headpiece and feathers surrounding her.