Vanessa Hudgens Surprises Cancer Patient at High School Prom

She’s always up for giving back to her fans, and Vanessa Hudgens made a special boy’s day this week.

Cesar, a 17-year-old battling cancer, was shocked with the “High School Musical” star showed up at his prom on Thursday (August 28).

The event was thrown by The Art of Elysium and Kaiser, which Vanessa is in touch with, and when the actress heard about Cesar’s story she was thrilled to get involved.

A source told E! that Miss Hudgens "volunteered to make a surprise appearance and make his night extra special.”

"She dressed up, spent most of the night dancing with the kids and took countless photos with fans," the witness added. "[Cesar] told me it was the best night of his life."