A tape allegedly showing X Factor Judge Tulisa Contostavlos performing oral sex on an unidentified man has emerged online. The video was featured on several websites, including one called NotTulisa, but it has since been taken down. A cached version however remains, with the following text: “Not Tulisa and an ex-boyfriend recorded themselves having sex in a public place, shot backstage at a music gig, on his Blackberry. “This crystal-clear movie is in no way is a hidden camera! Just look at Not...