The 30-year-old star revealed on her Twitter page that she has finally finished work on the album.
She said on Twitter: 'Just finished Christmas record!'
The day earlier she wrote a message that her brother-in-law, Fall Out Boy singer Pete Wentz, visited her at the studio with his baby son Bronx.
She said: 'My buds @petewentz and BX came to the studio to hear my Christmas album and Bronx kept saying 'more'!!! I'm a hit with my nephew!'
The star was recently spotted jetting out of LA with her boyfriend Eric Johnson and mum Tina.