Anushka is critical of herself and says she was a very bad singer five years ago, but has learnt a lot since then.

"I think, I was a pretty bad singer five years ago, but now I have become better... I have matured, I understand music much better... I've learnt in these years and will continue to do so," she said.

So which heroine would she like to sing for in future?

"I want to sing for all the famous heroines. I want to become their voice. If you sing for big films and famous heroines then that helps you.

"I never thought that my voice would suit Kareena but when I sang 'Tu sala' ('Golmaal Returns'), it became hugely popular and my voice completely suited her. So now I think my voice will suit most girls," said the singer.

When asked whether formal training is a prerequisite to become a successful singer, she was quick to reply: "I don't think so. It helps if you sing songs which are completely classical based, where I take more time, but it's not something you can't do without. Kishore Kumar never had formal training but he was a great singer and hugely successful."