A singer and an impressionist have become the latest acts added to the grand final of Britain’s Got Talent.

Calum Scott, 26, who prompted show supremo Simon Cowell to push his golden buzzer at the audition stage, won tonight’s semi-final which was the last in a series of five nightly programmes.

Cowell said Scott’s performance was “fantastic”, and added that he felt “quite smug” having singled him out in the initial stages of the competition.

(ITV)
(ITV)

Impersonator Danny Posthill also made it through to Sunday’s final after the judges were at deadlock in their decision to choose between him and nine-year-old martial arts performer Jesse-Jane McParland.

Posthill was described as “incredible” by Amanda Holden following his performance, while David Walliams said the final needed some comedy.

Earlier, Cowell defended the show over claims that a talking dog act is cruel.

Viewers have complained about French ventriloquist Marc Metral and his dog Miss Wendy since their first appearance on the show.

(ITV)
(ITV)

Cowell, who has “thought a lot” about the act, said he brought in the RSPCA to check the animal was not being mistreated.

He said: “I believe if you can show that animals have personalities, more people will hopefully respect them and show compassion.”

Cowell, who owns two dogs and supports several animal charities, said: “We asked the RSPCA to see Wendy in rehearsals and I was told she was happy and looked after well.

“As animal lovers I will always listen to your views. I would never allow any animal to be treated in a cruel way. But care that you care.”

(Tom Dymond/SYCO/THAMES TV/PA)
(Tom Dymond/SYCO/THAMES TV/PA)

The act uses a muzzle-like device to create the illusion of a talking dog, but Metral has previously defended his methods, saying he has worked with Wendy since she was a puppy.

Every night this week contestants have been performing for a place in Sunday’s final, with the hope of winning a £250,000 cash prize and the opportunity to appear at the Royal Variety Performance.

Last night’s show saw a father and sons vocal group and a teenage singer added to the final line-up.

(ITV)
(ITV)

Isaac Waddington, 15, won last night’s semi-final after Cowell told him he had put on a “fantastic, fantastic performance”, but it was The Neales – a four-piece vocal group consisting of singing solicitor Laurie Neale and his three sons James, Dan and Phil – who brought out his sensitive side.

They sang Father And Son, and when they finished, Cowell said: “God, I actually got quite emotional. What’s happened to me?”

He added: “I really like you guys.”

Old Men Grooving (ITV)
Old Men Grooving (ITV)

At the start of this week, Welsh choir Cor Glanaethwy and dance group Entity Allstars became the first acts to go through to the final.

Performing dog act Jules O’Dwyer and Matisse won Tuesday night’s semi-final, while dad-dancing five-piece Old Men Grooving also became finalists.

On Wednesday, magician Jamie Raven and Siberian dance troupe UDI were put through.