In "Ekk Albela", Vidya essays the role of late actress Geeta Bali.
"This is not a biopic on Geeta ji (Geeta Bali). I won't claim to even have (made a biopic)... You don't see all shades of her, you will see Geeta ji the star and see me recreating her songs.
"I do get drawn to real life stories and which is why I liked the 'Bhagwan Dada' biopic," the 38-year-old actress told reporters at the song launch event of "Ekk Albela" last evening here.
The "Paa" actress is open to do a biopic on Bali but says she will have to put in lot of work on the looks.
"In case of Silk Smitha in 'The Dirty Picture', I had to use my imagination and to play Geeta ji (Geeta Bali) I had to watch her videos," she said.
"I have tried to imbibe some mannerisms of her (Geeta Bali) in the dancing portions specially. I think it's way easier if you don't know the person. When you know the person you don't know what all to pick up," she added.
In "Ekk Albela", Vidya had insisted its makers to include singer Lata Mangeshkar's famous song 'Shaam Dhale Khidki Tale' from "Albela" in it.
Vidya was nervous while doing the song on screen.
"She (Geeta Bali) played with her eyes, face, hands, her fingers spoke so much, she used her wrist beautifully. Most of the shots are close up, so what I realised is that the smile, face all of that was something that charmed," she said.
"So I wasn't nervous about dance but expressions are form of dance. I focused on that. The choreographer was also saying that no Vidya Balan...Geeta Bali," she added. The "Parineeta" actress reveals her producer husband Siddharth Roy Kapur's passion is to have lot of old film posters.
"He has 60-70 posters and that keeps changing. But since the time we have got married we have not changed one poster and that is of 'Albela'," she said.
"And Bhagwan Dada has learnt dance from Siddharth's grandfather (who) was a pioneer in bringing western dance to India. I think I was meant to do this," she added. The noted actor-director Bhagwan Dada died in poverty and most of his associates deserted him.
When asked if it is sad state of affairs in Bollywood that when a star loses his charm there is no one to look after him, Vidya says, "we have heard lot of stories of yesteryear stars that are disheartening.
"I don't think it's a phenomenon unique to only Hindi or Indian cinema. It happens world over and it is very unfortunate," she said.