09/13/2007 at 02:00 PM EDT
Still dealing with the nude-photo fallout, Vanessa Hudgens canceled her appearance on The Tonight Show with Jay Leno
Producers confirmed that the High School Musical
star, 18, had been booked and that they were rescheduling.
No reason was given for her cancellation, and a rep for the actress did not respond to a request for comment. But her no-show comes after naked pictures of Hudgens
hit the Internet last week. She has since apologized to her fans
and says she is "embarrassed over this situation."
This week, Hudgens was given a boost when she received a vote of confidence from the head of a clothing line that uses her as a spokeswoman.
"More power to her," Marc Ecko, founder and chief creative officer of Marc Ecko Enterprises, tells PEOPLE. "She made a mistake and has apologized for it. I'm just glad no one's leaked the pictures of me in all of my naked glory."
Hudgens stars in the fall and holiday 2007 and spring 2008 ad campaigns for Red by Marc Ecko, a contemporary young women's apparel and footwear collection.
Hudgens is the second young actress recently to cancel a Tonight Show
appearance. In July, Lindsay Lohan
also bowed out of the program
after her DUI arrest, and was replaced by comedian Rob Scheider – who showed up dressed in drag as Lohan.
Reporting by MONICA RIZZO