They are two of the world’s biggest music stars, whose relationship has been on/off for several years.But there was no doubting Rihanna and Drake’s chemistry as they took to the stage at OVO Fest in Toronto, Canada on Monday night.The Work singer, 28, made a surprise appearance during Drake’s set and stole the show as she twerked in a pair of tiny hotpants.

The singer – who is known for her seductive performances – did not hold back as she brushed herself against him, much to Drake’s apparent delight.The Canadian hunk didn’t take his eyes off his former flame and her famed derriere as he danced right behind her.

Hot and heavy: The 28-year-old beauty, making a surprise appearance during Drake's set, bent down to twerk on the rapper, 29, who danced close to her derriere in response


After grinding for the whooping crowd,  Drake wrapped his arms around the slender brunette and pulled her close to him, as they continued the saucy routine.The raunchy display came as Rihanna flew to Canada to make the unexpected appearance during a break in the European leg of her Anti World Tour.

Rihanna also performed some of her own numbers at the set, including recent release ‘Bitch Better Have My Money’.

Dressed in a busty off-the-shoulder top, tiny hotpants and some racy thigh-high blue denim boots, it is no wonder Rihanna caught the attention of her supposed lover, giving a saucy flash of her glowing skin as she strutted around the stage.