BBC Manchester - Justin Bieber asked his fans to keep quiet before singing a song at a gig in Manchester. “Try and stay as quiet as possible,” he said. “You can scream as much as you want afterwards but while I’m singing try and stay quiet.” It was the first of three dates in the city for the Canadian pop star. Later, the 22-year-old cut a chat with the crowd short while trying to explain why his trek across the globe was called the Purpose World Tour. “I just thought I could have a moment to say something. I can cut [it] if you want,” he said. “I’m trying to engage but if you guys don’t want to, I’ll play the music.” But some fans weren’t happy that Justin Bieber had told them to be quiet. Hollyoaks actress Nadine Mulkerrin was there and tweeted: “We love your music but you are RUDE!!!!!!!!” Justin Bieber also told fans in Birmingham earlier this week to calm down and stop screaming while he was talking.