Justin Bieber and Lady Gaga (WENN.COM file photo)

A lawyer working for Justin Bieber and Lady Gaga has threatened legal action against comic book creators over a series of unauthorized cartoon strips.

The Poker Face hitmaker and teen sensation Bieber have both been animated as part of a series of graphic biographies by Bluewater Productions. The Gaga version was released in June and the Baby singer's comic is due to come out next month.

But the pair's attorney Kenneth Feinswog is seeking to block the publications - he has served the company with a cease-and-desist letter, threatening to sue Bluewater bosses if the books aren't pulled.

Publisher Darren G. Davis is refusing to bow under pressure - and insists his animators are well within their rights to create comic strips from celebrities' lives.

He says, "We are 100 per cent within our first amendment rights. We knew our rights on this before we jumped into the biography world. These are 100 per cent biographies on their lives.

"We reach out to all the celebrities and some choose to work with us and some do not. If they do choose to work with us, we donate ads and money to a non-profit (organization) of their choice. We offered the same deal to Bieber's people."

Taylor Swift and soccer star David Beckham have already had comic characters created in their image by Bluewater staff.