HIGH SCHOOL MUSICAL stars Zac Efron and Vanessa Anne Hudgens have reportedly ended their real-life romance after a dream vacation turned into a nightmare. The young lovers were spotted hand in hand at the MTV Movie Awards on 3 June (07) but a road trip immediately following the event really tested their love for each other. An insider tells America's In Touch Weekly magazine, "Zac borrowed a car and the two headed off on their own. It was raining and they soon got lost. Zac was yelling at Vanessa that it was her fault." The teenage couple reportedly got into an argument and split up on the trip.