The market, which is famed for its unique shopping stalls, is due to be transformed into a shopping centre, if development plans get the go-ahead.
The 'Foundations' star has announced she is playing a gig at the market in an undisclosed venue, with a guest appearance from Graham Coxon.
The former Blur guitarist voiced his concerns at the plans earlier in the week. He told Camden New Journal: "This is a pathetic attempt at modernisation, What's going to be in it? More Starbucks coffee houses and Carphone Warehouses?
"It should be full of tailors, shoemakers, cheesemakers and independent shops, but of course they are not going to do that."