"Rihanna at London Fashion Week" London - Arabstoday It was only Sunday night that she stunned in a glamorous daring evening gown during London Fashion Week. However Rihanna has already switched back to her more trashy style, swapping ball gowns for sexy tights, a leather hat and not much else. The singer stepped out of her hotel in the British capital on Sunday in the equally daring number. Donning stripey tights which showed off her lean legs with a pair of patent leather heels, the Umbrella hitmaker kept warm with an oversized denim jacket. She showed off her ladylike tastes during Stella McCartney's Winter 2012 London Evening Wear Presentation and dinner in Mayfair the night before. But on Sunday she appeared to throw it all out of the window with her mix of looks. She teamed her denim number up with a leather cap which appeared to be placed over a woollen beanie hat. And she ensured eyes were all still firmly on her with oversized sunglasses and a number of gold chains around her neck. Rihanna's new blonde locks were also seen beneath the hats, although she'd clearly had much less styling than the night before, which was a far cry from the outfit she stepped out in on Sunday. The singer made an impact with a green frock at the fashion event and managed to look classy despite its plunging neckline, thigh-split and low back. Her blonde hair was worn down and straight, while she accessorised to perfection with gold strappy heels and a matching chunky necklace. She was seen mixing with the fashion elite inside the event, including host Stella McCartney and her pal, supermodel Kate Moss. While she's been spending time in London, the star has faced rumours she's set to reunite with her ex-boyfriend Chris Brown in the recording studio. Reports emerged over the weekend from Vibe.com claiming that Rihanna and Chris are going to be hooking up on a remix of her upcoming single, called Birthday Cake. A source told the magazine: 'Rihanna loves to live dangerously and talking to and hooking up with Chris is all part of that.' Fans have been stunned by the rumours as Riri has previously pressed charges against Brown for hitting her. But the pair, who last collaborated in 2007, has reportedly become friends again recently.