Trainer Jules O'Dwyer claims she wasn't trying to deceive the audience, despite the fact no-one knew about the extra pooch involved.
Remember when Matisse pulled off that insane tightrope trick on the final of Britain's Got Talent? Well it wasn't actually Matisse. What?!
Turns out that winner of the talent competition, Jules, actually used another one of her border collies, Chase, as a stunt double for the acrobatic trick.
Jules told The Mirror that Matisse isn't a fan of heights, so she chose to use a more confident canine Chase for that particular part.
Feeling a bit cheated? Well so is Simon Cowell, who according to show insiders has ordered an urgent investigation.
Jules doesn't think she was wrong to pull the wool over our eyes, saying: "I was just putting on a show, it was not my intention to deceive people."
Defending her decision, she continued: "We have never hidden the fact we used a multitude of dogs."
There were only two dogs on stage at the end of the act, Matisse and three-legged hound Skippy, so viewers assumed they were the only two pooches involved - not three.
"Dog lovers would have seen the difference," remarked Jules, "as they are differently marked".
Meanwhile, a statement from BGT said: "We are sorry if this was not made clearer to the judges and viewers at home during their final performance."
Check out the final act below, starring Matisse, Skippy and Chase.
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