Mariah Carey locks horns with porn star!

Singer Mariah Carey is trying to block porn star-turned politician Mary Carey from trade-marking her similar-sounding stage name

Singer Mariah Carey is trying to block porn star-turned politician Mary Carey from trade-marking her similar-sounding stage name, saying it could cause much confusion among fans.

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But the adult film actress, whose real name is Mary Cook, said she would not be intimidated by the international superstar and would press forward with her trademark application, said hollywoodreporter.com.

Said Mary: "I'm ready to battle Mariah over this because I've been Mary Carey for a long time. It's kind of funny because I'm a porn star and I've been being

myself for a long time. I think she's being silly."

She started using the stage name Mary Carey in 2002 and once ran for California governor against Arnold Schwarzenegger. Mary filed the trademark papers earlier this year.