Stars concerned over Amanda Seyfried's singing

The cast all wore special earpieces to help them sing in time and on key but the forgetful actress would often leave hers somewhere on set and try to sing a capella, reported the New York Daily News.

Amanda Seyfried.Pic/Santa Banta

Her co-star, actor Eddie Redmayne, said that during one duet, Seyfried's singing was terrible but he was too embarrassed to tell her. "I was doing a romantic duet with Amanda (Seyfried) and she was singing off-tune and slightly off-tempo, and I kept thinking, 'This is an interesting take on the song'.

We got to the end and she admitted she didn't have her ear piece on. She was just singing along a cappella. I was too embarrassed to tell her," he said.

Seyfried also said that her castmates were so concerned with her odd performance they thought she was having a stroke as she attempted to keep in time without the ear piece.

"I would leave it (the ear piece) somewhere and I wouldn't want anybody to know. I would just pretend I had it in. They all thought I was having some kind of stroke. It was kind of funny when we cut. They would be like, 'What's wrong with you?'" she added.