Matt Cardle debuts his new music video... but even X Factor can't edit his past as the girl he dumped for stardom makes a cameo

By DAILY MAIL REPORTER Debut: Matt Cardle's music video for winner's single When We Collide was released today X Factor 2010 winner Matt Cardle's ex-girlfriend accused him of dumping her as soon as he had his first taste of success.But Lauren Cutmore will undoubtedly be smirking when she sees her ex's new music video for winner's single When We Collide, which made its debut today.Proving that