Disco Dogs brought the party and gained four BIG woofs! But little did the Judges know that it was ANT & DEC and STEPHEN all along! See more from Britain's Got Talent at http://itv.com/talent SUBSCRIBE: http://bit.ly/BGTsub Facebook: http://www.facebook.com/BGT Twitter: http://twitter.com/BGT Instagram: https://www.instagram.com/bgt/

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