Hallelujah! It's Côr Glanaethwy | Grand Final | Britain's Got Talent 2015

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Hallelujah! It's Côr Glanaethwy | Grand Final | Britain's Got Talent 2015 with tags britain's got talent, britains got talent, britain's, got, talent, britains, bgt, 2015, ant and dec, ant, dec, simon cowell, david walliams, alesha dixon, amanda holden, hellelujah

The 165-piece Welsh choir brought the house down with their rousing semi-final performance.

Could their magnificent rendition of hallelujah bring home a win to the valleys?