Katrina expressed her views when she appeared on "BFFs with Vogue - Season 3" along with Anaita Shroff Adajania. The show is aired on Colors Infinity, read a statement.
"There has been a major shift in a way that I have started approaching my work and characters. I think I have worked very hard, been very passionate and very focused, in certain ways and about certain things.
"I think the kind of way I worked in 'Raajneeti', 'Zindagi Na Milegi Dobara' and in 'New York' was a different me and I love those films," Katrina said.
But there was a phase where she was "taken over by something else".
"There was another phase which came, which was also great and it was a phase where I think I kind of let go a bit and I was really consumed and taken over by something else in my life which was not my work.
"Basically the relationship that was in my life became my focus and I was happy. I don't say that in a regretful way. What I did in that, maybe which in retrospect you learn from is I probably let a lot of things in the way I was working slide a bit," added the actress, without taking any names.
Katrina, who refrains from talking about her personal life in public, was in a relationship with actor Ranbir Kapoor in the past. They reportedly dated for a couple of years before parting ways in the beginning of 2016.
During the signature BFFs game round, 'Say it or Strip it', when host Neha Dhupia asked Katrina to name a co-star from all her co-stars who she cannot trust with a major secret, she took Ranbir's name.
The episode will air on Saturday.
( With inputs from IANS )