The 35-year-old Shameless star is playing the 1980s billboard icon Angelyne in an upcoming miniseries created by Lars And The Real Girl screenwriter Nancy Oliver.
She had an anguished expression on her face during her new scene as she raised the guitar over her head to swing back down.
What a moment: Emmy Rossum filmed an emotional scene in Los Angeles this week that involved her smashing a guitar
Her big scene starts when Angelyne is led up the sidewalk from behind by a man who is possibly meant to be the character's beau Jordan Michaels.
Jordan was the man who initially discovered Angelyne by adding her to his band Baby Blue in the late 1970s.
The man in the scene has his hands over Angelyne's eyes until he suddenly removes them to show her a surprise somewhere up above.
Angelyne looks up in shock as the man behind her smiles giddily, evidently under the impression she will be delighted by what he had done.
Hard at work: She had an anguished expression on her face during her new scene as she raised the guitar over her head to swing back down
But instead Angelyne flies into a rage, resulting in the fiery moment where Emmy was filmed smashing up the guitar.
Emmy is a producer on the program along with her husband Sam Esmail, who is best known for creating the series Mr. Robot.
Angelyne, who was born Ronia Goldberg in communist Poland before immigrating to America, had her real identity dug up by