Vanessa HudgensLess than six months after her nude photos took the internet by storm, a sex tape featuring Vanessa Hudgens - and boyfriend Zac Efron - is said to be about to appear.

Reports claim that High School Musical star Vanessa is seen posing under a Christmas tree wearing nothing but a Santa hat and red thong.

She is then said to pout and tell the camera: “I’ve been a good girl this year.”

Zac is then said to join her on the X-rated video.

However those close to the young stars doubt the tape actually exists. One is quoted as saying: “Vanessa and Zac do enjoy a healthy and fun relationship but she learnt her lesson with the nude photos. If they have taped themselves together, any footage will be kept under lock and key. It could jeopardise both of their careers if it got out.”