Taylor Swift's opening act Ed Sheeran says she recently pranked him. "We went to Vegas to the Billboard Awards together... It was cool, but awkward, because 50 per cent of people were really American and 50 per cent were cool. Taylor got me a seat next to her. But I didn't know what to do as at a British ceremony, like the BRIT Awards, you just sit there and get drunk. But Taylor told me that at an American awards when someone wins, you stand up and clap, and when someone performs you stand up and dance. Then she left me on my own in the front row as she had to perform. Nicki Minaj and Chris Brown were behind me, so then after the first award I stood up and no-one else did. It was embarrassing... It was awkward."