Lily Allen has said her pop comeback might only be temporary and she is likely to devote herself to motherhood and writing for others in the near future.
The Hard Out Here singer said she had found "a little pocket of time" to return to the music world but did not have any long-term plans for her own recording career.
Allen announced her intention to retire from the chart world in 2009, going on to work on a fashion business and then concentrating on family life until she bounced back late last year.
In an interview with Q magazine, she said she is unsure whether there will be anything further following an album she is working on.
She said: "When my kids start school I really want to be there. There was a little pocket of time I had to do this. One last hurrah and then I want to write musicals and songs for other people.
"I'm already halfway through a fourth album. Whether I can stretch to a fifth, I don't know."
Allen, who releases her third album Sheezus next week, admitted she does not like her chart-topping single Somewhere Only We Know, which was a hit in December. Her cover of the Keane song featured in the animated ads for the John Lewis Christmas campaign.
She told the magazine: "I really love the Keane version, I just don't like my version - I don't know what I think about that."
Despite her hopes of moving into writing musicals, she said her first attempt would not see the light of day. She has been working on a Bridget Jones production but said: "It's really good but it's not going to happen and I can't say why."
Lily Allen was announced to play Radio 1's Big Weekend which takes place in the Glasgow Green next month.