Justin Bieber is giving fans the chance to appear in his new 3D movie. Earlier this year it was announced that he'd be starring in a film that tells the story of his rise to fame. The film’s director Jon Chu and Bieber announced a 24-hour casting call via Twitter yesterday afternoon. To be considered, fans can upload a video of themselves on Bieber's website singing along to Justin’s "That Should Be Me" or an image of their best “U Smile,” which is the title of another of Justin’s hits. Within minutes, the huge number of hopeful fans crashed the site’s server, leaving technical support officers scrambling to get it back online. Justin posted an apology on his Twitter account: "Sorry u guys crashed the server!!" he tweeted. "Haha. It's back up now!! Get in MY MOVIE!!! U got less than 24 hours!! (sic),” Justin wrote. The casting call ends at 5 p.m. EST today.