Bristol Palin apparently thinks her baby daddy, Levi Johnston, is a big fat liar … and she’s subpoenaing CNN and Playgirl to prove it, TMZ reports.

The lawyer for Sarah Palin’s daughter is scoffing at legal documents filed by Levi’s lawyer — documents claiming Levi made but a pittance over the last few years and should not have to pay $1,688.42 a month in child support — which is what Bristol wants.

Levi says the best he’s done in the income department so far is last year — claiming he made approximately $101,000.

TMZ reports that Palin’s not buying it, because her lawyer issued subpoenas today to CNN, Playgirl, Entertainment Tonight, The Insider, Star Magazine, and National Enquirer, asking for hard figures on how much they paid Levi.