Rihanna Shows Off Her Derrière In A Plunging Backless Gold Dress At Met Gala Afterparty

How do you solve a problem like Rihanna? Last night, as the most star-studded gala of the year came to an end, ball-gown-clad celebs made one final outfit change and headed to either the Top of the Standard, or Rihanna’s post-gala shindig at Up & Down.

Check out Rihanna's outfit to her afterparty...