Radio 1′s Hackney Weekend in East London saw singers including Rihanna, Dizzee Rascal, Jessie J and Lana Del Rey winning the audience’s hearts with their rollicking performances. Rihanna, who performed in front of a giant sphinx, remarked, “Hackney, you’re crazier than they told me!” 50,000 fans were stunned to watch her performing on Only Girl In The World, and last year’s global number one hit, We Found Love. She even…