After a huge delay that saw her take to the stage at the opening night of Rio de Janeiro's Rock in Rio festival at 2:30am, Rihanna rocked the crowd who had been booing her empty stage - many of whom could be spotted sleeping as they waited for her. She came out in a very Rio-like look, with a tiny outfit and wearing shades and proceeded to go through a catalogue of her hits to the massive approval of the tens of thousands of fans. Pictured: Rihanna