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