Singers Ian Brown and Rowetta were among those sharing tributes, with the latter calling her a "beautiful friend".
Ms Mounfield, who had twin sons, was diagnosed with bowel cancer three years ago.
Alongside her husband, she raised funds for charity by organising auctions of items from David Beckham and Oasis.
She told the BBC: "I just don't want to be sat thinking about cancer and illness all the time, because it is all-consuming.
"And this was just a way to balance that out - to give myself something else to think about but something positive."
"Sometimes I have bad days and demon days and I'll have side effects. And other times people haven't got a clue that I'm ill because I try and carry on as best as I can."
Her husband Mani previously said: "This is a girl from Blackley - people from that side of town, they don't take things lightly."
After her diagnosis,he told the BBChe underwent a "whole spectrum of emotions - one day you can be paranoid and flapping and very, very fearful about stuff and then the next day you can see she's putting in the effort, there's a pride in the fight of the lady".
"It really puts you through the wringerâ¦ it's an old juggling balancing act of keeping your own emotions in check while also trying to offer a bit of support."
Primal Scream bassist Simone Marie described Mounfield as "a beautiful soul, a huge heart, cutting humour, the strongest spirit, a mother, a wife, a wonderful human".
"My heart breaks for the immediate family and everyone who knew and loved her."
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Tributes have been paid to Imelda Mounfield, the wife of Stone Roses bassist Mani, who has died from cancer.