American Idol winner Carrie Underwood has drawn first blood in her bitter fight with country music rival, Jessica Simpson, dissing the busty blonde’s singing ability and her apparent weight gain.

A pal of Underwood’s told OK! magazine: “[Carrie] finds Jessica’s love of putting her life on display pretty desperate.”

When Underwood saw Jessica’s new cover story with People magazine – the one where she gushes about how Tony Romo (Carrie’s ex) is the love of her life – things got even cattier.

“[Underwood] laughed at the People cover,” the friend explained, “because it’s the same one Jess did about John Mayer [back when they were "in love"] – same smile, same look, except she’s a little fatter.”

Ouch! And that’s not all the Idol singer had to say about her bustier rival!

“Carrie doesn’t think fans will spend money to watch Jess warble through a few badly written songs,” Underwood’s pal added.

I’d tend to agree with that last part…

[Source]