The punk-rock prom queen is back! Rachael Leigh Cook surprised “Josie and the Pussycats” fans who gathered in Los Angeles Saturday for Cinespia’s 25th anniversary screening of the 2001 cult film. Around 4,000 fans crowded the Hollywood Forever Cemetery as the film’s writing and directing duo Deborah Kaplan and Harry Elfont introduced special guests Cook and Kay Hanley, who played the film’s titular role and her singing voice, respectively. “I have never felt more pride for being in a film that’s sort of also in excess with unearned ownership of that product, because I am only half of this role,” Cook told the crowd — more than half of whom…