Karan Johar has denied reports that his next film, tentatively titled 'Short Term Shaadi' starring Kareena Kapoor and Imraan Khan is an adaptation of the Hollywood movie 'What happens in Vegas'. The filmmaker said that the film is an original story written by debutante director Shakun Batra and is not inspired by the Cameron Diaz-Ashton Kutcher starrer hit rom-com.