11/30/2007 AT 07:30 PM EST
Reports suggesting Jessica Simpson
– who spent Thanksgiving weekend in Texas with Dallas Cowboys quarterback Tony Romo – received lip injections this past week are false, her rep tells PEOPLE.
"Jessica did not have anything done to her lips," her rep says. "She tried Restylane some time ago and did not like the way that it looked or felt, so she has not had anything done since."
[Restylane is described by the manufacturer as a Swedish-made injectable gel that adds fullness to the skin and corrects facial wrinkles]
Speculation fueled this week after photographs surfaced of Simpson in Los Angeles sporting what some perceived were fuller lips.