Kanye West left his fellow stars speechless as he debuted his new single, All Day, at the 2015 BRIT Awards on Wednesday evening.The controversial rapper delivered an expletive-filled performance as he revealed the latest single from his yet-to-be released album that drew mixed reactions from the likes of Taylor Swift and Lionel Richie.In the ferocious performance which saw the star sharing the stage with British grime artists such as Skepta, Krept and Konan, Jammer and Novelist, the rapper was heard saying the N-word at least three times despite ITV’s attempt to mute his swearing.