The `Baby` singer`s lawyers have issued a cease and desist letter to company RC3 over their cartoon game `Joustin` Beaver`, according to website TMZ.

In the game, the player has to get a beaver - who bears a resemblance to the pop singer - to sign `Otter-graphs`, while defending him from `Phot-hogs` as they float downstream.

Justin`s representatives are demanding the $0.99 game be removed from sale on iTunes and asking RC3 to hand over their accounting and revenue figures.

However, the company is defending itself, saying the game is a parody and therefore protected by the US First Amendment.

Justin - who turns 18 next week - recently admitted now he is a huge megastar he has become a target for people, but he does his best not to let it get to him.

He said: "Now that I`m on top, everyone wants to bring me down. Everyone`s trying to tug at me and take my spot."

He has also said his faith in God helps him to keep strong.

Justin - who has a tattoo of Jesus Christ`s face on his left calf - said: "A lot of people who are religious, I think they get lost. They go to church just to go to church... but for me, I focus more on praying and talking to Him. I don`t have to go to church."
sections: Celebrities