The cast and crew of “Never Say Never” could barely be heard over the screaming tween fans afflicted with Justin Bieber fever at the Nokia Theater on Tuesday.Bieber said nothing those fans could do would shock him. “I’ve seen it all,” he said, suggesting that the craziest act was a fan who got a tattoo of his face. Still, Bieber manager Scooter Braun begged to differ. “They’ll surprise me,” he said. “They always do.” Diane Warren, who penned a song for the flick, said that Bieber brought her back to her own days of fandemonium: “This is like the Beatles – which shows my age.” Director Jon M. Chu admitted that the toughest part about making the film was simply keeping up: “This kid has a crazy life. I was just trying to follow him with a camera.” Producers Jane Lipsitz and Dan Cutforth said the fan support meant they could either go big or go home. “He’s got rabid fans and I think they’re expecting a lot from the film,” Lipsitz said. “Though on the flip side they love him so much that they probably would have loved anything we gave them.” But since Lipsitz and Cutforth are the Emmy-winning duo behind “Top Chef,” they rose to the challenge. After all, rabid fans are nothing new to them. “Tom Colicchio has this type of following,” Cutforth joked. “It’s just with middle-aged women.” At the preem, the Bieber fan base also included Miley Cyrus, Kathy Griffin, Chris Brown, L.A. Reid, Usher, Selena Gomez and Will, Jaden and Willow Smith. Also in attendence were Judd Apatow, Leslie Mann, Jane Lynch and Jamie Foxx.