In 2005, Robb was the face of Trad Clothing, helping to design and model a fashion line for girls. In 2006, she had a guest role on the cartoon show, "Danny Phantom" as the voice of Danielle "Dani" Fenton. Robb played Leslie Burke in "Bridge to Terabithia" with Josh Hutcherson, which opened in U.S. theaters on February 16, 2007. She recorded a song for the soundtrack titled, "Keep Your Mind Wide Open", and the accompanying video received rotation on the Disney Channel. The song peaked at No. 90 on the "Billboard" Hot 100 during the week of March 1, 2007, giving Robb her first charting single. Robb was a fan of the book before being cast in the role, saying that it "touched me in a way I hadn't been touched by a book before".