Katy Perry is set to receive the Video Vanguard Award at the MTV Video Music Awards (VMAs). The 39-year-old pop star will be honoured at the annual awards show at the UBS Arena in Elmont, New York on September 11. Bruce Gillmer, the president of music, music talent, programming and events for Paramount, said in a statement: “Katy is a musical powerhouse and true pop culture icon.” Katy will also perform a medley of her biggest hits live at the awards show, including ‘Roar’, ‘Dark Horse’, ‘Firework’ and ‘California Gurls’. Bruce added: “With her game-changing creative vision, she has become a g…