Lily Allen discovered a "f****** massive lump" on her right breast after undergoing cosmetic surgery earlier this year

Asked how she felt about the procedure, Lily said: "Good, although I have got a f****** massive lump in my right boob. I think it must be a cyst. Yeah. It's not dangerous. I went to have a mammogram and an ultrasound in New York last week and it came back OK."

She added her decision to have surgery was linked to changes in her body and weight loss during a difficult period.

Lily said: "I felt like it. No, actually, you know what it was? It was that I got really, really thin when I was feeling at my lowest, in the past year or so. Or longer, actually.

"And I knew that I had to gain weight. And I've always been bottom-heavy and so I had a fear that if I was to gain weight, my body would feel out of proportion.

"And so I felt like, why not gift myself a get-out clause? Make it feel more enticing."

In March, Lily described her operation as "incredible" and said she had been buying new lingerie to celebrate her body.

Speaking on her Miss Me? podcast with friend Miquita Oliver, she joked about the contrast between her breasts and her face. She said: "They look really incredible when I take my top off, and my bra off, but there's definitely a contrast in age between my breasts and my face.

"I'm like 40, 18, 40, 18. I'm just thinking 'maybe I get the BBL next'. I quite want the bum."

Discussing recovery, Lily said: "There's a thing that happens a few months after you get them which is they drop and fluff. So they're still quite high and they're still quite hard.

"When they drop and fluff they feel like normal boobs. So I haven't got to drop and fluff yet, I'm very much looking forward to that."

She continued: "I feel like it's really fun. I'm buying fancy lingerie that my boobs can actually fit in and taking pictures on my phone. Haven't sent them to anyone yet, but it will hopefully get there at some point. On my 40th birthday I'm going to drop and fluff."

Lily's comments come as she prepares to release her first album in seven years, West End Girl, written after her separation from David.

She said the record, released under her new deal with BMG, explores her life in a new city and the aftermath of the split.