Meanwhile British actress Lily Collins looked stunning in a demure black blouse and accompanying white skirt with distinctive floral embellishments.
MailOnline may earn commission on sales from these product links Peek-a-boo: Rihanna's unfortunate nip-slip overshadowed her vintage themed ensemble American model Gigi Hadid was another head turner thanks to her revealing semi-sheer minidress, while pop legend Madonna was at her outlandish best in tight leather micro-shorts and fishnet tights.
Who would have imagined that an all black, baggy outfit would reveal so much?! But not everyone took issue with the head-scratching style.
He explained: 'Signing Rihanna is a fantastic step for Puma.