Westlife have paid tribute to Simon Cowell during an appearance on Britain's Got Talent . The band - which features Shane Filan, Nicky Bryne and Kian Egan - performed their biggest hits ahead of their 25th anniversary tour. However, they were without bandmate Mark Feehily, who will also not appear on the tour. There was no specific mention of Mark, but the trio paid a heartfelt tribute to judge Simon, who was instrumental in their success. "It's been a long time since Simon Cowell suggested