Yes, really. Remember when Rihanna wore her Chanel one? Well, now the nana-functional fashion fave is officially trending. Take your style cues from Argentinian model and street-style star Tatiana Cotliar: a bright orange bumbag teamed with a black 'n' red bomber (it's all about clashing up colours) plus a Kenzo tiger-print tee says F-U-N. One word: converted.