Vanessa Hudgens was terrified about her all-singing, all-dancing appearance at the Oscars - because she dreaded falling over in front of Brad Pitt and Angelina Jolie.

The High School Musical actress teamed up with her co-star - and boyfriend - Zac Efron to sing Last Chance from the movie's soundtrack and donned a dazzling showgirl outfit for the performance at this year's (09) Academy Awards.But Hudgens was filled with fear about tripping over in her heels in front of the star-studded audience.She tells Britain's Company magazine, I was freaking out backstage at the Oscars because I was wearing high heels and didn't want to trip down the stairs in front of Brad and Angelina, half-naked in a leotard and top hat. But it was amazing to perform for the ceremony.