Could it be Calum Scott's time to sparkle |Grand Final | Britain's Got Talent 2015

See more from Britain's Got Talent at http://itv.com/talent Simon's golden buzzer act Calum won his semi-final with an inspired song choice. But will his spine-tingling rendition of Rihanna's Diamonds in the final cut it with the crowd SUBSCRIBE: http://bit.ly/BGTsub Facebook: http://www.facebook.com/BGT Twitter: http://twitter.com/BGT