A 15-YEAR-OLD Feltham girl has become a YouTube sensation after wowing the judges on Britain's Got Talent on Saturday.

By Tuesday more than 300,000 people had viewed Demi Bennetts and pal Megan McKenna's performance on the video sharing website along with the 10 million who tuned in to ITV1 on Saturday evening.

And the girls, who performed a song from the musical Wicked under the band name Harmony, hope to be sent through to the semi-finals when they go before the judges again tomorrow (Saturday).

Judge Amanda Holden said she was 'passionate' about their performance, while Simon Cowell said he liked them and they were sent through to the next round with three 'yes' votes.

Demi, who lives in Redford Close, said: "I was just speechless. It was really good. I was just like: 'Oh my God'. I couldn't believe we got through.

"I can't wait to find out on Saturday if we get to the semi-finals. It's going to be scary again but I hope we get through."

The winner of the hit ITV show wins £100,000 and gets to perform in front of the Queen at the Royal Variety Performance and previous winners Paul Potts and George Sampson have gone on to release successful albums and live tours.

"Hopefully we will win the whole competition but we don't even know if we are are going to get through."

Watch Demi and Megan's audition