Has Britney Spears changed her will?

Troubled pop star Britney Spears has reportedly changed the terms of her will - in a bid to make sure her mother Lynne never gets custody of her sons Sean Preston and Jayden James.

Britney recently hand-delivered a motion she intends to make legal if her mother does not stay away from her sons, and publicly revealed she's "praying" for her mum.

Mother and daughter reportedly fell out when the Toxic singer discovered Lynne had been criticising her parenting skills to friends and associates, according to the National Enquirer.

And now the publication has discovered bitter Britney has also changed her will, leaving her estate and her boys in teenage sister Jamie Lynn's hands upon her death.

According to the Enquirer, Spears' new will stipulates that her cousin Alli Sims will be responsible for Sean Preston and Jayden James if Jamie Lynn, 16, is under 21 when the pop superstar passes.