Notoriously clingy Jessica Simpson is bringing the claws out with BF Tony Romo’s ex-love, Carrie Underwood. Jess is so threatened by Carrie’s “goody two shoes” that the ditzy blonde has warned Grammy Award-winning country singer to “keep away from Romo!”

“Carrie is a total threat to Jessica,” a Simpson camp spy reveals to OK! “Jessica called Carrie and told her to keep away from Tony”

The OK! snitch claims Jessica even made Tony change his telephone numbers and e-mail address so that Carrie cannot contact him.

“She needs so much attention that it’s impossible to date her.”