Jessica Simpson is being criticized by her new movie costars for forgetting her lines on set, just days after she caused a sensation by forgetting the lyrics to a song during a tribute to country music legend Dolly Parton.

Simpson is filming a remake of the classic Melanie Griffith movie Working Girl in Shreveport, Louisiana, and filmmakers are frustrated by her performance.

The source on the set of Blonde Ambition tells People magazine, "After the seventh take on one shot, the director hid a microphone in her ear so a crew member could feed her lines.

"Everyone was embarrassed for her, but she laughed it off, saying, 'I'm sorry, everyone. I'm sorry.'"

Costar Luke Wilson was a bit more sympathetic to Simpson's plight, reportedly patting her on the back and reassuring her that things were okay.