Actually it is Jessica Simpson.
http://www.nationalledger.com/artman/publish/article_272617575.shtml
Yup, Jessica Simpson doesn't seem to be distracting Romo in the way that that Carrie Underwood did last year.
As a side note, Undwerwood's latest song makes fun of her distractive powers. It's called "All American Girl", and it describes a gal who dates the star quarterback, who subsequently begins to play badly. The gal gets nothing but grief from the community because of what she's doing to lower the QB's productivity.