"She has been back to work but is recording at her own pace. Her appeal has always been the quality of her music so she isn't about to rush release anything just for the sake of it."
The 25-year-old singer vowed not to tour again until Angelo turned two although she has been in the studio with composer James Ford and singer/songwriter Kid Harpoon, who has worked with the likes of Florence and the Machine.
Her last tour accompanied her multi-platinum record 21, released in 2011, although she was forced to cancel shows after suffering a hemorrhage on her vocal chords.
She underwent surgery and has been adamant she doesn't want to tour until next year even if the new album is released before the end of the 2014.
The source added: "If her last sales are anything to go by, she doesn't exactly need to."
