We're not quite sure whether this is good or bad news, but Justin Bieber isn't going to sound like a 12 year-old girl anymore.
Justin's going through puberty and admits his voice is starting to crack and sound a lot different.
He said: "It cracks. Like every teenage boy, I'm dealing with it and I have the best vocal coach in the world.
"Some of the notes I hit on 'Baby' I can't hit anymore. We have to lower the key when I sing live."
Meanwhile, actual 12 year-old girls went nuts just thinking about Bieber earlier this week in Australia and police were forced to cancel his show due to "mass scenes of hysteria" after 10 girls fainted.
He tweeted: "I love my fans and I am just as disappointed as everyone else with the news from this morning. I want to sing for my fans. I want to make this clear... I don't cancel... I woke up this morning to the police canceling the show for safety reasons."
He may not have his girly voice anymore, but at least he still has millions of fans worldwide ready to faint at the sheer thought of seeing him live. He's obviously doing something right!