It might not be the comparison that the Disney folks are really looking for, but director Brett Ratner was paying Miley Cyrus his highest compliments when he compared the teenage phenom to pop icon Madonna. Having worked with the Material Girl on "Beautiful Stranger" and having just directed Miley's new video "7 Things," Brett says, "She turns it on. A lot like Madonna. Where a lot of other artists are nervous or they're primping, you know, Madonna walks on and is casual; cameras are on her and then all of the sudden, wow! Same thing with Miley. She's hanging out, she's telling the jokes, she's laughing, she's signing an autograph. Camera goes on her and she was just unbelievable." But one thing Miley has over Madonna and other divas? Apparently, an enormous fan base. "Like I said, I've shot for Madonna, Mariah Carey - some of the biggest artists in the world - and I've never had more calls," says the director. "I had at least a thousand calls. 'Can I just come by the set and watch Miley?' and I'm like, 'But you're 40 years old!'"