A talented group of youngsters from Port Talbot had Britain's Got Talent viewers in hysterics when they pranked Simon Cowell mid-way through their dance performance - by squirting cream all over his face. Troll Dancers, made up of 30 six to 10 year olds from TDM Dance School in Port Talbot , first took to our screens during the pre-recorded audition episodes of this year's series. After impressing the judges and live audience with their elaborate, funky routine to September by Earth, Wind & Fire, they were back on-screen tonight to compete in the semi finals.

Dressed in bright, vibrant colours and fully taking-on their characters as 'trolls' (inspired by Dreamworks' hit children's animation film), the group performed a thrilling dance routine to I'm Coming Out by Diana Ross and the Party Rock Anthem by LMFAO, with loads of hilarious moments to boot. After their performance, host Declan Donnelly joked the stage was "absolute chaos," whilst judge Alesha Dixon labelled the group "cheeky little trolls," adding: "You did brilliantly well, you made it fun, I loved it - it was a colourful spectacle." For the latest TV & Showbiz news, sign up to our newsletter TV: Loose Women's Denise Welch leaves colleagues speechless with X-rated confession SHOPPING: New Look shoppers praise 'really flattering' floaty summer dress with sleeves Amanda Holden agreed, praising the group's dancing, choreography and costumes as "absolutely gorgeous".

"Oh my god, you went for it," added Bruno Tonioli. "I.