Allen claimed that the media have misrepresented certain aspects of the Back To Black singer.
"I know Amy Winehouse very well. And she is very different to what people portray her as being," she told Scotland On Sunday.
"Yes, she does get out of her mind on drugs sometimes, but she is also a very clever, intelligent, witty, funny person who can hold it together. You just don't see that side. She gets a really hard time."
The star went on to claim that she and Winehouse both suffer from unfair treatment from tabloid newspapers.
"I mean, there aren't that many people with whom the press concentrate on their personality so much. I think in the UK, as far as females go, it's mainly me and her that get that treatment.
"She gets it more than I do. But I don't see it that much with other people."
Lily Allen releases her new album It's Not Me, It's You on February 9.