The trio's original members were Kerry Katona, Liz McClarnon and Natasha Hamilton until Katona left in 2001 after becoming pregnant.
However, Katona's financial difficulties could see her reunite wth McClarnon and Hamilton - along with replacement Jenny Frost - for a number of gigs this year.
The band previously reformed last year without Katona, a move which she said squandered their chances of success. "I made that frigging band, but they never bothered to invite me back," she said at the time. "Without me they're nothing."